One thing I'm trying to instill in my son is :Once you screw up, you'll always screw it up again and again, so never screw up!
He even comes up with his own acronym :OSU, ASU (Once screwed up, forever screwed up!)
That's something I have tried to live by for a long time. Not that i never screwed up, I did, and I'm still screwing up the same thing every time.
So, never, ever, screw things up....