The most important thing to remember if you decide to do drugs is this: there are certain people you have to be sure to avoid.
Avoid being around anyone who has never done drugs unless you are 100% sure ahead of time that they are really cool about it. If you can find someone like that hang on to them because they're your ride home.
Avoid being around anyone who suffers from manic depression or is otherwise a downer because they'll just insure you a bad trip. Unless of course you suffer from manic depression. Birds of a feather and all that, but you might seriously want to reconsider doing drugs until you've looked into treating your condition. Unless of course you like morbid bad trips.
Avoid being around anyone who is an off-duty policeman, or government worker or whatever, unless you are 100% certain they're already doing drugs and won't turn you in.
And most of all, and I cannot stress this enough, under no circumstances are you to ever take any advice from a guy like me, because beyond caffeine, nicotene, alcohol and tylenol, I don't know what the hell I'm talking about.