Be Fonz cool is the golden rule. That is, don't flagrantly flame or hate people, keep content PG13-ish (while I've never seen a barrier on graphic violence, gratuitous descriptions of sexual organs or acts is not allowed), and uhh... No that's about it really. The big no no's are don't commit hate speech against individual people (characters or concepts are fine) and don't describe sexual acts or organs except through metaphor and so on.
ex: If two characters have sex, fade to black. If a character is naked, don't describe the naughty bits. So on and so forth.
Sowing the seeds for one's own destruction.
First you really don't wanna be that guy who is looking for work or post secondary at age 20 who doesn't even have a high school GED cuz they skipped too many classes to qualify for it. Especially in this economy. Just... Trust me on that one.