Every failure contains clues if embarrassment does not destroy the evidence.

Failure carries a great deal of specific information about what went wrong and where. Embarrassment goes to work on it immediately, blurring the details, shifting the account, and encouraging you to stop looking. By the time the shame has finished, the useful part is gone and all that remains is a bad feeling with nothing attached.

Give yourself a short window after something goes wrong to write down exactly what happened while you still remember it plainly. No verdicts, just the sequence. You can have the difficult feelings afterwards, and the record will still be there when you are ready to use it.