The five things worth capturing while the case is still fresh, the ones that are not worth the ink, and the evidence on how fast the useful detail disappears.
Detail disappears fast. Operative performance ratings written more than two weeks late were flat and generic; the authors argued for discounting anything past three days.
Structured beats blank. Fixed fields took operative report completeness from 64% to 99.8% in one study, and took less time to fill in.
Your own sense of how the case went is the least reliable thing in the note. Write what happened, not how you think you did.