Might as well add the last three then.
12) Smoking does not make you look cool. It makes you look moronic. Next time your out cruising, watch an 11-year old with a butt in his mouth. Thats what you look like to anyone over 20. Ditto for "expressing yourself" with purple hair and/or pierced body parts.
13) You are not immortal. (See Rule No. 12) If you are under the impression that living fast, dying young and leaving a beautiful corpse is romantic, you obviously haven't seen one of your peers at room temperature lately.
14) Enjoy this while you can. Sure parents are a pain, school's a bother, and life is depressing. But someday you'll realize how wonderful it was to be a kid. Maybe you should start now. You're welcome.