Most of what I'm going to say has been said already, but I'll rephrase most of it. I typed out a paragraph and a half but my internet cut out and it didn't post. Oh well, I'll summarize on what I was going to say.
Don't try to be cool, don't do things that people pressure you into doing. Also don't be afraid to be a little different. If you choose to hang out with a druggie crowd then make sure you don't fuck up your education and not go class, I did it and I regret it 100%. Just make sure you hang out with an OK crowd, don't feel down because you're not popular. Don't be a pussy about everything (not saying you are a pussy). Just make sure you don't skip all of your classes, Once or twice every week is acceptable. Just make sure you keep your head up.
ps. stay away from the black kids.