Time Blocking and Single-Tasking: The Complete Guide to Planning Your Day and Focusing on One Thing

Time blocking is a way of planning your day by giving every task, or group of tasks, its own block of time in your calendar. Single-tasking means working on one task at a time, without switching, until it is finished or the block ends. Together they are the core of what Brian Tracy taught about managing time.

Time management method · Themes: time management, focus, planning, deep work

Last updated: 13 November 2026

Written by Saj Ali

Reading time: about 11 minutes

How we wrote this guide: this guide was written by Saj Ali. It draws on Brian Tracy’s _Eat That Frog!_ (third edition, 2017), Cal Newport’s description of time blocking and published research on task switching, interruptions and planning. Every research claim links to its source.

Time blocking and single-tasking in brief

• Time blocking. Plan your day in blocks of time, each with a specific job.
• Single-tasking. Do one task at a time, and finish it before you switch.
• Block sizes. Brian Tracy suggested 30-, 60- and 90-minute segments for important tasks.
• Planning time. Cal Newport spends 10 to 20 minutes each evening planning the next day.
• Pairs well with. Eat That Frog: make your frog the first block of the day.

Contents

1. What Are Time Blocking and Single-Tasking?
2. How Brian Tracy Approached Time
3. How to Time Block Your Day: Step by Step
4. An Example of a Time-Blocked Day
5. Why Single-Tasking Matters
6. What the Research Says: At a Glance
7. Common Mistakes and How to Fix Them
8. Tools and Variations
9. Frequently Asked Questions
10. Key Takeaways
11. Explore More on Self Help Supermarket
12. Sources

What Are Time Blocking and Single-Tasking?

Most to-do lists tell you what to do but not when. Time blocking fills that gap. Instead of working from a list and reacting to whatever arrives, you decide in advance how each part of your day will be used, and you write it down as blocks on a calendar or a sheet of paper.

Single-tasking is how you use each block. You choose one task and stay with it, rather than switching between email, messages and three projects at once.

Brian Tracy taught both ideas in Eat That Frog!. In “Create Large Chunks of Time” he wrote that “most of the really important work you do requires large chunks of unbroken time to complete” and advised: “Make work appointments with yourself and then discipline yourself to keep them” (Tracy, 2017). In “Single Handle Every Task” he wrote that once you begin, “you keep working at the task without diversion or distraction until the job is 100 percent complete” (Tracy, 2017).

The author and computer scientist Cal Newport, who calls his own version “time blocking”, describes dividing each hour of the day on paper into blocks “labeled with specific assignments”, and correcting the plan when the day changes (Newport, 2013). See our Cal Newport page.

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How Brian Tracy Approached Time

Tracy made time management the subject of many of his books, from Eat That Frog! to a short AMACOM title called simply Time Management. His approach to the working day rested on four ideas from Eat That Frog! (Tracy, 2017).

1. Schedule blocks for important work

“Set aside thirty-, sixty-, and ninety-minute time segments that you use to work on and complete important tasks.” His examples included salespeople who phone prospects “for one solid hour, between 10:00 and 11:00 a.m.”, executives who set aside a time each day to call customers, and people who read for 15 minutes every night.

2. Use a planner

“A time planner, broken down by day, hour, and minute and organized in advance, can be one of the most powerful personal productivity tools of all,” because it lets you see where you can consolidate time for concentrated work. During those blocks, he advised turning off the phone and eliminating distractions.

3. Single-handle every task

His rule was to begin your most important task and “concentrate on it single-mindedly until it is complete”, repeating “Back to work!” whenever you are tempted to stop. He also used the phrase “efficiency curve”: the longer you work steadily on one task, the more quality work you produce in less time, and every interruption sends you back down the curve.

4. The Law of Forced Efficiency

“There is never enough time to do everything, but there is always enough time to do the most important thing.” Blocking your day forces the choice about what that most important thing is.

He also suggested using travel and waiting time, what he called “gifts of time”, for small pieces of larger tasks. For more on his overall system, see our Brian Tracy article.

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How to Time Block Your Day: Step by Step

Weekly (20–30 minutes)

1. Review your goals and deadlines for the week.
2. Choose your big tasks, the two to five things that would make the week a success. Use the ABCDE method or the 80/20 rule to pick them.
3. Book blocks for them in your calendar, ideally in your best hours.

Daily (10–20 minutes, the evening before)

1. List tomorrow’s tasks and fixed commitments such as meetings.
2. Choose your frog, the most important task, and give it the first good block of the day.
3. Give every other task a block. Group small, similar tasks, such as email, calls and admin, into one or two “batch” blocks.
4. Add buffers. Leave space between blocks and an open block in the afternoon for things that come up.
5. Write the plan down on paper or in your calendar, where you will see it.

During the day

1. Start each block by closing everything you don’t need.
2. Work on one task only. If something else comes to mind, write it down and return to the block.
3. When the plan breaks, fix it. Newport’s approach is not to abandon the plan but to redraw the remaining blocks; he leaves room on the page for corrections (Newport, 2013).
4. End the day with a two-minute review. What took longer than planned? Use that next time.

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An Example of a Time-Blocked Day

Here is what a time-blocked day might look like for someone in an office job. Adjust the times to your own energy and commitments.

Two blocks of focused work on the most important tasks, communication grouped into batches, and room for the unexpected.

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Why Single-Tasking Matters

Many people feel that doing several things at once gets more done. Research suggests the opposite for most tasks that need thought.

• Switching costs time. Experiments by Joshua Rubinstein, David Meyer and Jeffrey Evans found measurable time costs each time people switched between tasks, and that these costs were larger for more complex tasks (Rubinstein, Meyer & Evans, 2001).
• Attention lingers on the last task. Sophie Leroy showed that when people switch away from an unfinished task, part of their attention stays with it, a state she called “attention residue”, and their performance on the next task suffers (Leroy, 2009).
• Interruptions raise stress. In a study by Gloria Mark and colleagues, people who were interrupted compensated by working faster, but reported more stress, frustration, time pressure and effort (Mark, Gudith & Klocke, 2008).
• Heavy multitaskers filter less well. Eyal Ophir, Clifford Nass and Anthony Wagner found that people who routinely juggle several media streams were more easily distracted by irrelevant information and, surprisingly, performed worse on a task-switching test (Ophir, Nass & Wagner, 2009).

Tracy put a number on the cost: he wrote that starting and stopping a task “can increase the time necessary to complete the task by as much as 500 percent” (Tracy, 2017). That figure isn’t supported by a cited study and is best read as his estimate. The research above shows the cost is real, even if its size varies.

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What the Research Says: At a Glance

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Common Mistakes and How to Fix Them

• Planning too tightly. Because people underestimate how long tasks take (Buehler, Griffin & Ross, 1994), a day blocked edge to edge will fail. Add 25 to 50 percent more time than you think, and keep an open block.
• Blocking everything except the important work. If your calendar is full of meetings and admin, your frog has no home. Book the important block first.
• Giving up when the day changes. Interruptions are normal. Redraw the rest of the day rather than abandoning the plan.
• Leaving email open during focus blocks. One quick check can undo the block. Close it, and give email its own time.
• Ignoring your energy. Put demanding work in your best hours. For many people that is the morning; for some it isn’t. Our morning routine guide has more on this.
• Blocks that are too long. Ninety minutes is a long time for many tasks. Start with 30 to 60 minutes, with short breaks between.

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Tools and Variations

• Paper. Newport and Tracy both used paper plans. A sheet divided into hours is enough.
• Digital calendars. Colour-code blocks by type: focus, meetings, batches, personal.
• Theme days. Give whole days or half-days to one kind of work, such as “Monday: planning and admin; Tuesday and Thursday: client work”.
• Batching. Group similar small tasks, such as calls, email and errands, into one block.
• Timeboxing. Give a task a fixed maximum time, and stop when it ends, even if the work isn’t perfect.
• The Swiss cheese start. If a block feels too daunting, commit to the first 10 minutes. See our salami slice and Swiss cheese guide.

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Frequently Asked Questions

What is time blocking?

Time blocking is planning your day by giving each task, or group of tasks, a specific block of time in your calendar, so that every part of your working day has a job.

What is single-tasking?

Single-tasking means working on one task at a time, without switching to email, messages or other work, until the task is done or the block ends. Brian Tracy called this “single handling”.

How long should a time block be?

Brian Tracy suggested 30-, 60- and 90-minute segments for important tasks. Many people find 60 to 90 minutes works for focused work, with shorter blocks for email and admin.

What if something urgent comes up during a block?

Deal with it if it is genuinely urgent, then redraw the rest of your day. Cal Newport recommends correcting the plan rather than abandoning it, and keeping open blocks for the unexpected.

Is multitasking really less efficient?

For tasks that need thought, yes. Research shows that switching between tasks has time costs, that unfinished tasks leave “attention residue”, and that interruptions raise stress.

What is the difference between time blocking and timeboxing?

Time blocking plans when each task happens. Timeboxing sets a fixed maximum time for a task and stops when it ends. Many people use both together.

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Key Takeaways

• Time blocking gives every task a time; single-tasking gives each block one task.
• Book your most important work first, in your best hours.
• Group small tasks such as email into batches.
• Plan buffers, because people underestimate how long tasks take.
• Research on task switching, interruptions and planning supports the approach.

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Explore More on Self Help Supermarket

Use these pages alongside this one:

• Eat That Frog – put your frog in the first block
• The ABCDE Method – choose what goes into your blocks
• Salami Slice and Swiss Cheese – start blocks that feel too big
• Morning Routine: The Golden Hour – start the day in the right frame of mind
• Cal Newport – deep work and time blocking
• Flow State – the deep focus that long blocks make possible
• Brian Tracy: His Life, Philosophy, Techniques and Legacy – the full system
• Productivity – more ways to get the right things done
• Browse all self-help techniques – compare every method on Self Help Supermarket.

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Sources

1. Tracy, B. Eat That Frog! 21 Great Ways to Stop Procrastinating and Get More Done in Less Time, 3rd edition. Berrett-Koehler, 2017. O’Reilly listing. https://www.oreilly.com/library/view/eat-that-frog/9781626569430/
2. Self Help Supermarket. “Brian Tracy (1944–2026): His Life, Philosophy, Techniques and Legacy”. https://www.selfhelpsupermarket.com/brian-tracy-tribute/
3. Newport, C. “Deep Habits: The Importance of Planning Every Minute of Your Work Day”, calnewport.com, 21 December 2013. https://calnewport.com/deep-habits-the-importance-of-planning-every-minute-of-your-work-day/
4. Rubinstein, J. S., Meyer, D. E., & Evans, J. E. (2001). Executive control of cognitive processes in task switching. Journal of Experimental Psychology: Human Perception and Performance, 27(4), 763–797. https://doi.org/10.1037/0096-1523.27.4.763
5. Leroy, S. (2009). Why is it so hard to do my work? The challenge of attention residue when switching between work tasks. Organizational Behavior and Human Decision Processes, 109(2), 168–181. https://doi.org/10.1016/j.obhdp.2009.04.002
6. Mark, G., Gudith, D., & Klocke, U. (2008). The cost of interrupted work: More speed and stress. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, 107–110. https://doi.org/10.1145/1357054.1357072
7. Ophir, E., Nass, C., & Wagner, A. D. (2009). Cognitive control in media multitaskers. Proceedings of the National Academy of Sciences, 106(37), 15583–15587. https://doi.org/10.1073/pnas.0903620106
8. Aeon, B., Faber, A., & Panaccio, A. (2021). Does time management work? A meta-analysis. PLOS ONE, 16(1), e0245066. https://doi.org/10.1371/journal.pone.0245066
9. Gollwitzer, P. M., & Sheeran, P. (2006). Implementation intentions and goal achievement: A meta-analysis of effects and processes. Advances in Experimental Social Psychology, 38, 69–119. https://doi.org/10.1016/S0065-2601%2806%2938002-1
10. Buehler, R., Griffin, D., & Ross, M. (1994). Exploring the “planning fallacy”: Why people underestimate their task completion times. Journal of Personality and Social Psychology, 67(3), 366–381. https://doi.org/10.1037/0022-3514.67.3.366
11. Wikipedia. “Parkinson’s Law” (C. Northcote Parkinson’s 1955 essay in The Economist), accessed 13 November 2026. https://en.wikipedia.org/wiki/Parkinson%27s_law