A refreshed mind can solve what an exhausted one kept making larger.

Problems grow when tired minds work on them. Each pass adds complication rather than resolution, the difficulty appears to expand, and the effort spent makes abandoning it harder. Then rest arrives and the same problem is smaller and often simple.

When something has resisted three attempts in one day, stop. Come back to it after sleep rather than after coffee. The time lost is smaller than the time spent making it worse.