Diet
Eating meat (and animal products) is bad for your health, the environment and the animal that was needlessly killed.

Sex
Don't be controlled by the animal within you. Like a woman for something more than her ass. Clothes can pervert us sexually. Sex becomes forbidden and other forbidden things can get tied into the mix... Clothes make us go overboard and act crazy when they are finally taken off. Try to restrain yourself to some extent and not act too stupid.

Work
I think the ideal would be a college major where you are actually learning useful things in your classes, not just jumping through flaming hoops. Biology, medicine, that direction has somewhat less bullshit.In engineering you can learn to derive equations for some ideal scenario that doesn't exist in the real world and then go run and assembly line. Most college majors have some similarities to this. Becoming a doctor would mean a lifetime of hardwork taking care of cheeseburger eaters but at least is actually useful and being high up in the power hierarchy at work means less stress, less worrying about the whims of stupid people with power over you.

Play
Be well rounded. Play multiple sports but don't just play sports. Please read. If you don't, you're going to be ignorant. Watching TV will not make up for not reading. TV is just too stupid. A thousand channels and nothing's on because it's all controlled by just a few companies. Oligopolies produce shit products the same as monopolies. Don't be too serious but don't always be unserious. Find a medium.

Art
To express one's self is to do art. Just the action of speaking is expressing yourself. But playing music is also. And painting, etc. I strongly recommend you attempt to express yourself in some manner. I would like you to learn a musical instrument, although how far you go depends on how much you like music.

Politics
Those with the power/money want to stop change from happening and will do whatever it takes to ensure that. They control the news media. They fire/don't hire people who don't say/report exactly what they want to be reported. This means a certain slant (certain facts are excluded or emphasized/demphasized). And only certain stories get reported at all. Thus it's not really much of a democracy.

Drugs
They really aren't worth it. The legal ones even are just playing with fire. Chocolate and caffeine often lead to insomnia and feeling excessive stress. The illegal ones have the negative jail and addiction. A very few people go on about the incredibly positives. In my experience these people are generally incredibly stupid though. And a wrong turn here could turn your life into hell.

Religion
On a subconscious level, we're all mystical. If we weren't, it would be impossible to live. Lot of ugly crap is tied into organized religion though. And generally speaking followers of organized religion are kind of stupid.

Friendship/Relationships
Got to be some kind of balance. If one person feels inferior, just doesn't work. Got to be able to disagree. Got to be able to criticize each other.