>>1 Welcome to the Dollars!
The "Do's and Don'ts" here are the same as any other forum. You can read all about it on the FAQ's, but some things are a given.
Like weeabooing. While it's not on the FAQ's (I don't think it is), most members disprove of it greatly.
That said, I advise you to read about it on the FAQ's and lurk to get a sense of what's "right" and "wrong". There's not much that you 'should' do here. I'm guessing contribute and help keep the site organized, but a few members take care of the (majority) spam/irrelevant threads.