Respect Respect your fellow players and treat them as you would wish to be treated. The golden rule is in effect here. When in doubt, if you can't be nice, be an adult and avoid the other person.
Activity One post or one thread with five comments from your character per month. It's disrespectful to your fellow players to character squat.
Don't godmode, infomod, or power game. Your character is neither all knowing nor all powerful. Remember to allow them to fail at things in game, and to keep your OOC knowledge out of your characters' minds.
ICA=ICC In character actions yield in character consequences. Be prepared to reap what your characters sow, and don't be surprised if things come back to haunt them.
IC=/=OOC The actions and opinions of characters in the game do not necessarily represent the opinions of the players portraying them. Conversely, do not use your character as a mouthpiece to speak your own opinion or torment the characters of players you don't like.