Resurrecting a very old thread I stumbled across...
Written by vet173 above
"An amateur does it till he gets it right, a pro does it till he can't get it wrong."
Vet, if you're still on apug, as a pro I can assure you mistakes are part of being pro as well. I'm thankful for this as I would otherwise stop learning and there would be nothing left to strive for. The journey would be over. Actually, I don't consider myself a pro, I'm just very grateful that I get paid to do what I love, photography.