The 1-3-5 rule means planning no more than 1 big, 3 medium and 5 small tasks in a day. That adds up to nine items, but the real idea is about size, not count: you know up front how much room each task will take in your day, so your list actually fits.
You probably know the feeling of starting the morning with fifteen items and copying half of them over to tomorrow by evening. That is not a discipline problem. It happens because the list has no limit. The 1-3-5 rule sets that limit and lets you make your choices the night before.
What is the 1-3-5 rule?
The 1-3-5 rule is a planning method that sorts your daily to-do list into three tiers based on how big each task is. Popularized by Alex Cavoulacos, one of the founders of the career site The Muse, it turns the question "what will I do today?" into "what do I have room for today?"
Each tier holds a different kind of work:
- 1 big task: The main job of the day. The one that lets you say "I finished something today" once it is done. It needs focus and usually takes 1.5 to 3 hours. The first draft of a report, preparing a presentation, an application you keep putting off.
- 3 medium tasks: Work that takes thirty minutes to an hour, needs some thought, but gets done in one sitting. Preparing for a meeting, reviewing a proposal, checking your weekly budget.
- 5 small tasks: Things that take less than fifteen minutes. Replying to an email, booking an appointment, paying a bill, sharing a file.
Nine items may look like a lot at first glance. But five small tasks together take less than an hour, and the real weight of the list sits on the big task and the three medium ones. That is how the rule lets your day be both full and finished.
Why does the 1-3-5 rule work?
The method's strength comes from turning an endless list into a limited plan. Most lists never end because nobody looks at the size of what goes into them.
- It forces you to choose. If there is room for only one big task, you have to decide which one really matters today. When that decision is made in the evening rather than the morning, the day starts with more clarity.
- It protects the big task. Small tasks finish fast and make you feel busy. Without a limit, they fill the day and the important work slips to tomorrow again.
- It caps the small stuff. More than five small tasks turns into a list of interruptions that chops your day into pieces. A sixth small task can wait until tomorrow.
- It makes the end of the day measurable. In the evening, all you need to check is whether the big task got done and how many of the medium ones did. You can see which tier the unfinished items got stuck in and plan the next day around that.
How do you size your tasks?
The only tricky part of the rule is deciding whether a task is big or medium. The most reliable way to do it is by time, not by gut feeling.
You can write an estimated duration next to each item. Anything under 15 minutes is small, anything between 30 and 60 minutes is medium, and anything over an hour and a half goes into the big tier. When a task falls in between, putting it one tier up is safer, because tasks almost always take longer than we expect.
Watch out for one trap: some items look like big tasks but are really projects. "Redesign the website" will not get done in a day, so it is not a big task. You can break it down to the first step you can actually do today, like "write the home page copy." The project name lives in a note, not on the list. Only today's piece goes on the list.
Example: a day built with the 1-3-5 rule
Here is what a freelance designer's list for Tuesday might look like, put together the evening before:
1 big task
- Finish the first draft of the client presentation (2.5 hours)
3 medium tasks
- Work out the pricing for the new proposal (45 minutes)
- Prepare the agenda for Thursday's meeting (30 minutes)
- Check this month's spending by category (40 minutes)
5 small tasks
- Reply to the revision email from the agency
- Book a dentist appointment
- Pay the electricity bill
- Share the presentation file with a teammate
- Confirm tomorrow's delivery time
The total comes to just over five hours. In an eight-hour workday, the rest of the time goes to meetings, breaks and the unexpected. Because the list is built around the day's real capacity, you can actually finish it by evening.
Apply the 1-3-5 rule in 5 steps
Building the list the evening before works best. That way you can spend the morning hours, when your mind is clearest, on the big task instead of on choosing.
- Get everything out of your head. First write every task in one place without thinking about size. This list can be long; its job is to clear your mind.
- Write a time next to each item. Based on the estimate, mark each item as big, medium or small. Break anything that will not fit in a day down to its first step.
- Pick the big task. Choose a single big task: the one that will make the day feel like a success once it is done. If you are torn between two, you can go with the one whose deadline is closer. If you cannot decide which matters more, the Eisenhower matrix makes that choice easier.
- Fill in the medium and small ones. Pick three medium and five small tasks. The rest are not deleted. They wait on the master list, and you look at them again tomorrow evening.
- Give the big task a time slot. You can place the big task in a real time slot on your calendar. A big task without a set time gets lost among the small ones. You will find how to do this in detail in our time blocking guide.
The next evening, setting aside five minutes to look at the list is enough. Check off what you finished, send what you did not back to the master list, and pick the nine items for the new day.
What if the rule does not fit you?
1-3-5 is not a formula, it is a starting point. You can change the numbers as the shape of your day changes; what matters is keeping the tiers.
- Meeting-heavy days: If you have three or four hours of meetings on your calendar, you can go with 1-2-3 instead of 1-3-5. Keep the big task, but make it shorter.
- Days full of interruptions: If the day keeps getting broken up, you can drop the big task completely and run with 0-3-5. Move the big task to a day when you can find an uninterrupted hour.
- Focus days: On a day with no meetings at all, you can give the big task half the day and cut the medium tasks down to two.
- Your own numbers: After a few weeks, you can look at how many items you really finish. If you carry over two medium tasks every evening, your formula is 1-1-5, and that is a useful result too.
In earlier articles we suggested 5 to 7 items a day. The 1-3-5 rule does not contradict that: five small tasks together take about as much room as one medium task. What needs measuring is not the number of items but the total time.
Which methods does it work well with?
The 1-3-5 rule only answers the question "how much today?" For the other questions, it gets along well with other methods.
- With the Eisenhower matrix: The matrix tells you which tasks matter, and 1-3-5 tells you how many of them fit into today. You can sort with the matrix first, then place the tasks in your day with 1-3-5.
- With time blocking: The 1-3-5 list decides what you will do, and the time block decides when. You can give the big task a block in the morning and the small tasks a single block in the afternoon.
- With a weekly plan: If you pick the big tasks for all five days at the start of the week, your evenings only need to cover the medium and small ones. We walked through that flow in our weekly planning guide.
How do you set up a 1-3-5 list in Pumpynotes?
In Pumpynotes, a to-do list is a block inside a note. You can build the 1-3-5 layout in a single note and reuse it every day:
- Separate the tiers with headings. Open a new note, type
/on an empty line and use the "Heading 2" block to add "1 big", "3 medium" and "5 small" headings. Then put a "To-Do List" block under each heading. Items come with checkboxes, and the ones you check get crossed out. - Keep the master list separate. You can add a sub-page to the same note and collect every task you dumped there without thinking about size. The day's list stays short and nothing waiting gets lost.
- Move the big task to the calendar. You can put the big task on your calendar as an event in a real time slot. When it is done, you can mark the event "Completed", and if the plan slips, drag it to another time.
- Track projects with statuses. Work that will not finish in a day deserves its own note. You can give notes a status and follow them in the Board view in the To do, In progress, Done and On hold columns. Only that project's step for today goes on your 1-3-5 list.
You will find the details of building lists inside your notes in our to-do list inside your notes guide, and ready-made examples of what to put on a list in our 25 to-do list ideas article. If your list still never ends, our article on why your to-do list never ends will help you find the reason.
Pumpynotes is free. Bring your calendar, notes and budget together in one workspace and manage the day's nine items from one place.
Frequently Asked Questions
What is the 1-3-5 rule?
The 1-3-5 rule is a to-do list method where you plan 1 big, 3 medium and 5 small tasks for a day. The big task takes 1.5 to 3 hours, medium tasks take 30 to 60 minutes, and small tasks take less than 15 minutes. The goal is to make the list fit the day's real capacity.
Aren't nine items too many for one day?
No, because the items are different sizes. Five small tasks together take less than an hour. The big task and the three medium ones carry the real load of the list, and the total usually lands between five and six hours.
What should I do if I cannot finish the big task?
You can make it the next day's big task, but first look at why it did not get done. If your time estimate was too short, you can split the task in two. If the day was full of interruptions, putting the big task in a protected time slot on your calendar usually solves the problem.
Should I use the 1-3-5 rule on weekends too?
You do not have to. A lighter version like 0-2-3, or just a few small tasks, is also an option for the weekend. What matters is that the list leaves room for rest as well.
What is the difference between the 1-3-5 rule and the Eisenhower matrix?
The Eisenhower matrix sorts tasks by importance and urgency, while the 1-3-5 rule decides how many of them fit into today. You can use them together: first pick what matters with the matrix, then place those tasks in your day with 1-3-5.
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