similar to the homer quote
"If at first you don't succeed, give up, no use being a damn fool about it"
"Anything worth doing would have already been done"
or if you want some positive ones
"It all works out in the end, if it hasn't worked out, its not the end"
"Don't sweat the small stuff. Everything's small stuff"
unfortunatly I dont know where these are from, I think some are movies, the others I picked up somewhere along the line.
-Darth Simon