Let's see...

Yeah, IX is the last really good one, just don't bother until XII comes around. It will be good for your blood pressure.

Don't stop writing, cause you are totally lazy and will stop all together for years....

See a school guidance councilor when you enroll into college, it will save you a lot of headaches.

Don't date C_____, yes, I know she's hot, funny and interesting. Just trust me on this, DON'T DO IT!

Don't loan money to family. You have a bad tendency of turning around and doing something stupid like rage quitting a job and then not have any money for bills. This will also save you a lot of time.

No matter how much you think things suck for you right now, just remember your pessimistic core and understand that it can always be worse. So appreciate what you actually have more often.

Rum is your alcohol Kryptonite. Just trust me on this, don't ever make a cocktail with Rum without instructions.

Guacamole is awesome, just suck it up and start eating it.

Drink more milk

Join a gym.

Wear Sunscreen