"If you think you've done something right, try fucking with it some more. If you have done something right, stop fucking with it." - Off the Top of My head
"Watch your thoughts, they become your actions
Watch your actions, they become your traits
Watch your traits, they become your character
Watch your character, it becomes your destiny" - I Can't for the Love of God Remember Who
"Saying you have a problem is annoying. Wanting attention for your problem is petty. Fixing a problem is hard, but you'll be better for it. If you can't, call the goddamn plumber" - Again, Off the Top of My Head, Though My Profanity Is Showing More Than Usual Today.
EDIT: I'll finish off with "There's no "I" in team. There's an "M" and an "E", but you have to share it." - Off Top Head
Oh yeah, and my quote of the week, though I don't know how wise it is; "Nobody can open those chips. Not even anybody." - Nathaniel (sister's friend's little brother)