Time blocking: how to plan your day in blocks

A to-do list has no clock in it. Ten tasks look the same whether they take one hour or twelve, so most lists end the day longer than they started. Time blocking fixes that by turning each task into an appointment with yourself: 9:00 to 10:30, draft the proposal. Meetings and fixed events go in first, then the work, then the gaps.

The idea is old. Cal Newport made it popular with knowledge workers in Deep Work and his time-block planner, but anyone who has ever written "gym, 7 p.m." in a diary has done a version of it. What makes it a method is doing it for the whole working day, every day, before the day starts.

• •It forces an estimate. You cannot place a task without deciding how long it takes, and that one decision catches most overloaded days before they happen.
• •It makes trade-offs visible. When the afternoon is full, a new request has to replace something. On a list it just gets added to the bottom.
• •It protects focused work. A two-hour block on the calendar is much harder to give away than a vague intention to "work on the report today".
• •It removes the next decision. When a block ends, the next one is already chosen. You spend less of the day deciding what to do.

1. 1.
   Put the fixed things in first: meetings, classes, the school run, lunch. Whatever is left is the time you really have.
2. 2.
   Pick one to three tasks that matter today, ideally ones that move a goal forward. Everything else is secondary.
3. 3.
   Estimate each one, then add a quarter. Almost everyone underestimates how long their own tasks take (psychologists call it the planning fallacy), so the margin is not pessimism, it is accuracy.
4. 4.
   Put the hardest work in your best hours. For most people that is the first half of the morning, before messages pile up.
5. 5.
   Batch the small stuff. Email, messages and admin get one or two blocks of 30 minutes instead of leaking into everything.
6. 6.
   Leave about 20 percent of the day empty. Things run over and new things arrive, and a plan with no slack breaks at the first one.
7. 7.
   At the end of the day, move what did not happen. Re-blocking unfinished work for tomorrow takes two minutes and is how nothing gets lost.

Here is a realistic day for someone with one big piece of work, a meeting and the usual inbox. Notice that only about six hours are planned work.

• •Scheduling every minute. A day with no gaps is broken by 10 a.m. Plan six hours of an eight-hour day.
• •Treating the plan as a contract. When the day changes, re-block the rest of it. The plan is a map, not a promise, and adjusting it is part of the method.
• •Vague block names. "Project work" invites drifting. "Write section 2 of the proposal" tells you exactly what to open when the block starts.
• •Ignoring energy. Two hours of hard thinking at 4 p.m. after five meetings rarely happens. Match the task to the hour.
• •Blocks that are too long. A three-hour block with no break rarely stays focused to the end. Split long work into blocks of 90 minutes or less with a short break between them.

Plan the day you have, not the day you wish you had: fixed things first, at most three tasks that matter, then room to breathe.

These ideas get mixed up, and they combine well:

• •Time blocking decides when a task happens: a slot on the calendar.
• •Timeboxing caps how long a task may take: when the time is up, you stop and ship what you have. It is useful for tasks that expand to fill any space, like polishing slides.
• •Task batching groups similar small tasks into one block, so email, calls or errands get done together instead of interrupting deep work.
• •Day theming gives whole days a job, such as meetings on Tuesday and writing on Thursday. It suits people with many different roles.

If focus is the hard part, pair blocks with the Pomodoro technique: a two-hour block becomes four rounds of 25 minutes with short breaks.

Time blocking works with anything that has hours on it. The tool matters less than the habit, but each has a cost.

• •Paper is quick and has no notifications, but re-planning means crossing out, and it cannot remind you when a block starts.
• •Google Calendar is free and already holds your meetings. The friction is that your tasks live somewhere else, so you copy them over by hand every morning. Our guide to time blocking in Google Calendar shows how to make it work.
• •A planner app keeps tasks and calendar in one place, so blocking a task is dragging it onto the day rather than retyping it.

Superhive is built around this method. Give a task a length and it lands on the day as a block in the free time around your events, and the daily shutdown moves whatever did not get done to tomorrow instead of letting it disappear down a list.