http://sythe.org/showthread.php?t=1319193 Here you will find some really good. A Sythe user created that thread for the quotes Although this is kinda different than what he posted
Some of my favourites are
'Take risks: If you win, you will be happy; if you lose, you will be wise.'
'You are today where your thoughts have brought you; you will be tomorrow where your thoughts take you.'
'Aim for success, not perfection. Never give up your right to be wrong, because then you will lose the ability to learn new things and move forward with your life.'