Don't be an asshat. Respect is the name of the game, if you can't give it you don't get it.
No self advertising. I give shout outs when they're appropriate. I wouldn't go to your channel to announce my stream is starting, don't do that here either.
Want to play with the rest of the family? Don't beg, it's going to be no for sure then. Ask once, if you're going to be invited you will be.