I really like Mike Singletary:

All I know is right now, when I look at the situation we had yesterday, we go on the road, we play a team, we lose, you come back, you’ve got a choice to make, do you dwell on that – ‘Wow, I wish we would have won the game. Man, I wish we would have done this differently. Man, I wish we would have done that differently.’ No. I think you take it. You’re man enough take it. You chew it. You spit it out. You learn from it and you get ready for the next game. You get ready for the next opportunity. I think winners let it go. Winners move forward. I think losers sit there and just wallow in it and talk about it all week. And, it screws you up for the next opportunity going forward.