Since I’m not as funny as Mullinator, I’ll just give you the serious answer.
First, we can’t call you jayjay because we already have one. Maybe J.Jay will work.
Second, if you see what looks like an inside joke, but you don’t get it, please, please don’t repeat it just for the sake of doing so. As Ike said, they’re overdone.
Third, as you can tell by my post, it’s customary to bold other users’ handles. It’s not required, though, and no one’s likely to say anything if you don’t.
(I’m tired of counting.)
If you offend someone by making bigoted statements, don’t be surprised if you get jumped on by a LOT of people. (Not saying you’d do this, obviously, since with only 5 posts, I have no idea what your beliefs are).
If you do get jumped on, for whatever reason, don’t take it personally. People can only know you for how you express yourself in the written word, and it has nothing to do with who you really are as a person. Step back, take a deep breath, and everything will be okay.
Spelling, punctuation and grammar are your best friends. This is the most literate board you’ll find just about anywhere thanks to holding these basics to high standards.
In Great Debates and sometimes elsewhere, people expect you to back your opinions with cites. I stay out of Great Debates for the most part. Those people are very, very smart, and they know how to debate a topic. Obviously, no one expects a cite on why blue is your favorite color.
If you stick around, you’ll learn people’s basic demographic information through their posts (such as gender, race, approximate age, marital status, sexual preference). You might get called to the floor, however, if you ask and you don’t seem to have a legitimate point in doing so.
SO (for significant other) is a good way to refer to someone’s, well, significant other, if you aren’t sure. It’s easier than saying, "Your spouse/gf/bf/partner).
Um, I can’t think of any more.