Now, for every roleplaying site there are rules. Since I am fairly sure that most of you have indeed RPed before, or at least have common sense, this will be brief.
Out Of Character: Player to Player/Player to Admin/Player to Self1. Be respectful [no insulting, etc]
2. Try not to bring up controversial topics [discussion is welcome, but please don't argue]
3. Suggest new rules
In Character: Character to Character1. Ensure that the character acts as that character should [i.e. no shy, sober characters running around cheerfully screaming without due reason]
2. No godmoding/powerplaying [allow others to react, and do not assume success]
3. Remember that in-character actions have in-character consequences [so don't insult high-ranking people where they can hear you]
Right. That's about it. This really shouldn't be all that hard to follow. After all, it's just common sense and curtesy.