52/17 Rule
Work for about 52 minutes, then take a real 17-minute break away from the task.
Problem
Working in long unbroken stretches, or only ever doing the unpleasant parts, drains energy faster than it returns. Deliberate breaks, sustainable rhythms and building some enjoyment into the work help you keep going for weeks, not just one afternoon. If exhaustion is persistent, it's worth talking to a doctor — productivity techniques are not a treatment for burnout.
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.
Work in 25-minute focused sessions separated by short breaks, with a longer break after every four.
Only allow yourself something you enjoy while doing a task you tend to avoid.
Plan your day as a sequence of blocks on your calendar, each reserved for a specific task or type of work.