Here are a few...
Failing to plan is planning to fail.
I've taught you everything you know; I haven't taught you everything I know.
Chance favors the prepared mind.
The Golden Rule: Do unto others as you would have them do unto you.
Alternative Golden Rule: He who has the gold makes the rules!
Measure twice, cut once!
From my grandfather: "It's hell to grow old." I always replied, "But it beats the alternative!" Glad he stayed with us as long as he did! (1901-1991)
If you don't ask, you don't get.