Every single director-actor I talked to, from Warren Beatty to Clint Eastwood to George Clooney, said the biggest mistake they made is not shooting enough footage of themselves.
You build on failure. You use it as a stepping stone. Close the door on the past. You don't try to forget the mistakes, but you don't dwell on it. You don't let it have any of your energy, or any of your time, or any of your space.
I was raised by an actress, and I watched all those women turn 60 and ask, Shouldn't get face work? My mother and Anne Bancroft said, We're not going to fall into that.