52/17 Rule
Work for about 52 minutes, then take a real 17-minute break away from the task.
Problem
Attention drifts — to your phone, to a different task, to nothing in particular. Open-ended work sessions make it easy to drift because there's no clear point where you're "allowed" to stop. Giving the session a clear shape, a clear target and a planned break makes it easier to stay with one thing.
Work for about 52 minutes, then take a real 17-minute break away from the task.
Work until your focus naturally fades, then take a break proportional to how long you worked.
Turn a vague goal into a concrete "If [situation], then I will [action]" plan.
Work in 25-minute focused sessions separated by short breaks, with a longer break after every four.
Plan your day as a sequence of blocks on your calendar, each reserved for a specific task or type of work.