You don’t have to finish in one sitting. You do have to start in one.

Starting is the only part that cannot be split up. A task can be spread across a week in any arrangement you like, but the first moment of real contact has to happen whole, and that moment is what avoidance targets. Once something is begun it exists and pulls on you; before that it is only a plan. The size of a job is rarely what keeps it undone.

Pick the thing you have been circling and give it ten minutes today, with no requirement to continue. Open the document and write one paragraph. Leave it visibly unfinished so that coming back is easier than starting.