Early in my career I learned about the FIDO Principle (Forget It and Drive On) as an aid to recovering from a mistake or from adversity. Seems Blackjack Pershing learned it before me!
“Now for a word of advice and don’t forget this. If you have a fall—mental, moral, or physical–pick yourself up and start over again immediately. If you do, in the long run life won’t beat you.”
Gen John “Blackjack” Pershing