Some problems need sleep before they need solutions.

There is a category of problem that dissolves with rest and cannot be touched by thinking. You circle it for hours, generating increasingly elaborate concerns, and none of it moves because the difficulty is in the state of the thinker rather than in the problem. Recognising which kind you are facing saves a great deal of wasted effort, and it saves you from decisions made in poor conditions.

When you catch yourself going over the same ground a third time, stop and note the hour and how you slept. Take the question up again after rest. Often the version that returns is noticeably smaller.