Start from a method.
Nine templates, each a known way of working. A template turns into ordinary break windows you can edit afterwards, with your own hours and days.
Pomodoro
25 minutes on, 5 off. A longer break every four rounds.
Francesco Cirillo's technique from the late 1980s: 25-minute focus rounds separated by 5-minute breaks, and a 20-minute long break after every fourth round. The rounds start at the beginning of your work hours and repeat until they end.
School day
50-minute periods, 10 minutes of recess, an hour for lunch.
The rhythm every school already runs on: a 50-minute class, 10 minutes of recess, repeat — with a full hour for lunch at 12:30. Familiar, forgiving, and easy to stick to.
52 / 17
52 minutes of work, then a 17-minute break.
From DeskTime's 2014 analysis of its most productive users, who tended to work in stretches of about 52 minutes followed by 17-minute breaks. Longer sprints than Pomodoro, and breaks long enough to actually leave the desk.
90 / 20
Ninety minutes of deep concentration, twenty of real rest.
Built on the ultradian rhythm: Nathaniel Kleitman's roughly 90-minute basic rest-activity cycle, which Ernest Rossi applied to work as 90 minutes of concentration followed by about 20 minutes of rest. Fewer, longer blocks for work that needs a run-up.
Deep work mornings
Four protected hours every morning, then the day opens up.
Cal Newport's rhythmic approach to deep work: the same protected block at the same time every day — about four hours, which is roughly as much deep work as a day holds — and the rest of the day open. Set your work hours to when the block should start.
Workday
Blocked during work hours, apart from lunch. Evenings and days off are open.
The classic nine-to-five fence: distractions are blocked while you work, with an hour off at lunch, and free once the workday ends. Nothing fancy — the schedule most people actually want.
Digital sunset
Feeds go dark in the evening and come back in the morning.
Screens off before bed: the sites are blocked from the evening until the morning, every day, and open the rest of the time. Named after the habit of putting devices away when the sun goes down — the schedule for better sleep rather than more work.
Weekends only
Blocked around the clock on weekdays. The weekend is yours.
Monk mode, Monday to Friday: nothing comes back during the week, not even in the evening, and everything comes back on the weekend. Pick which days count as the week.
One hour a day
A single daily window. Focus time the rest of the day.
The strictest schedule that still has a release valve: one window a day — an hour in the evening by default — and the blocklist enforced the other 23. Good for a reset, or for feeds you want to keep but not live in.