I think this is one
"It's either this man is dead or my watch has stopped!" Not sure who said it
This was the second post in this topic: Honey, Groucho Marx said this quote in Monkey Business. Though now that I think of it, Capt. Benjamin "Hawkeye" Pierce said this same thing in M*A*S*H, in season 1 (I think.)
Some other quotes I can think of:
"If at first you don't succeed, sky diving isn't for you."
"I never forget a face, but in your case, I'll be glad to make an exception."
"I've had a perfectly wonderful evening. But this wasn't it."
"Aging is mandatory. Maturity is optional."
"The wise man learns more from the fool than the fool learns from the wise man."
"The greatest remedy for anger is delay."
And finally, 'Lead, follow, or get out of the way."
Edit: New one to add: "Change is inevitable. Transformation is optional."