1. Karma exists.
2. Niceness triumphs.
3. Be yourself.
4. You can’t please everybody.
5. Education is everything.
6. Learning is lifelong.
7. Possessions mean less as you age.
8. No one has the answers when it comes to love.
9. Do the right thing. Not only will it make a difference, you’ll feel better about yourself.
10. Time starts accelerating sometime in your late thirties or forties.
Source: Lefsetz Letter » Blog Archive Life Rules – Lefsetz Letter