I love these type of sayings, I could go on all day but here's a few off the top of my head....
"say what you mean and mean what you say"
"if you're gonna do something do it right, even if its wrong"
"Dear God, stay out of our way" - Stewie Griffin
"Better late than never"
"If you wanna find out who your true friends are call everyone you know and ask them to help you move, only the real ones will show up"
"Money is like the wind, you only feel it when it's moving" - Boomhauer
"A bird in the hand is worth two in the bush"
"waste not want not"
"It's better to be rich and guilty than poor and innocent"
"I used to do drugs. I still do, but I used to, too" - Mitch Hedberg
"the only way to find your true limits is to push yourself beyond them"
"telling the truth is easier than lying because you don't have to remember the stories you've made up"
"women always say they want a nice guy but when it comes down to it they'll bend over backwards (or forward) for an a$$hole" - MedicatedMike
Here's one I Don't like..... "It's better to have loved and lost than to have never loved at all" personally I think that's bullshit. IMO losing love is worse than not loving, and that's coming from someone who doesn't have much feelings. Getting your heart broken sucks and makes you cry, I don't recall ever crying because I had no one to love. Sure, it's depressing but doesn't hurt like being dumped..especially when it's because you were an idiot and fcked it all up when the other person was perfect and would do anything for you.