1) Don't flame other users. I think this rule is pretty self-explanatory...we are all entitled to our own opinions, blah blah blah. It gets really irritating for the rest of us when a couple of people start slinging mud back and forth. So let's try to avoid catty slapfights, shall we?
2) On the flip side, try not to be too sensitive. Not everybody understands the concept of "tact". I know the disagreements over pairings can heat up pretty quickly, but please, try not to be too touchy about it. If someone votes against your favorite pairing in the fave pairing game, don't automatically assume that they have something against you. Everybody has their fave pairings and everyone has the right to support those pairings, even if that means advocating against your fave. It's unlikely that they have anything against you anyway...it's not all about YOU, after all
3) Choose any avatar you want...it does not have to be JN related. Again, in the tradition of preserving common decency, nothing nasty please. A photocopied picture of your coworker's butt left on your desk as a joke does NOT qualify as an acceptable avatar
4) Try to keep your signature size fairly small. Nobody wants to scroll down fifteen times just to get past all the pictures you uploaded into your signature. LIMIT the number of pictures in your signature to 3, no more please. And that includes banners from places like magicsigs. I've seen quite a few violations of this rule, so please correct this if you are one of said violators.
5) This is pretty much standard internet rule #1, but don't give out exclusive personal information over the net. I don't want to get in trouble for YOUR stupidity.

Well, that's all I can think of for the time being. If you have any suggestions for other rules, or if you think one of my rules is radically unfair, just give me a buzz. OK, now that you know, get posting! You didn't come here to stare at the screen, did you?