How many tasks should be on your to-do list?
There is no perfect number, but for a single day, fewer is almost always better: most people finish more when they plan three to five things than when they list twenty. A short list is easier to start, easier to finish, and easier to feel good about. The right number is the smallest one you will actually do.
Why long lists backfire
A long list feels productive to write and awful to face. Every extra item is one more thing to hold in mind and one more way to feel behind. Past a handful, a to-do list stops being a plan and starts being a source of guilt, and guilt does not help you start.
Why three is a common answer
Plenty of methods land near the same number: the daily three, the three most important tasks, the 1-3-5 rule. They share one idea, a hard limit that does the prioritising for you. When only three things fit, you are forced to choose what actually matters, and you start the day with a list you can picture finishing.
How to pick your number
Start with three and adjust. If you finish early most days, add one. If three keeps sliding to tomorrow, the tasks are probably too big, not too few, so break them down. NanoDo takes the strict version, three a day on your lock screen, and lets Pro go to five if you want a little more room.
This article is general information, not medical advice or a diagnosis. If task paralysis or focus is affecting your daily life, a doctor or an ADHD specialist can help.