11. You have illegitimate children you don't yet know about.
12. Replace all buttons on shirts with snaps, to prevent fabric tearing.
13. Put a DNA testing service on speed dial. Even if you're married, there's at least 50/50 chance the baby's not yours.
14. If your girlfriend and your mother don't end up hating each other, that means they're coming after you.
15. Keep a good scrap book or at least a good solid hard drive -- so you have proof of your life with your wife/girlfriend when she wakes from coma with amnesia and she can't remember you.
16. Always. Wear. A condom.
17. Own your own tuxedo. You'll need it for gala events, not to mention 7 of your 9 weddings.
18. Go ahead and put your entire academic future on the line to protest Donna Martin's ban from graduation. There will be no consequences and you'll feel better about yourself.
19. Know how to deliver a baby with absolutely no supplies, preferably in an elevator or a blizzard or both.
20. If you have any lady friends that go on a really bad date, the guy is going to end up stalking them. Be concerned, and look the part.