Here are some things that you should just not do on Twitter:
Don't Twitter every little event in your life- Why not? For one thing, everybody does it. You're not going to stand out in the crowd if you do what everyone else does. Except maybe, just maybe, everybody wants to hear about how cute your cat is, and how drunk you got on the weekend, and how you just lost two pounds. Think again--nobody cares.
Don't curse- Yes, we're all adults and we can handle four-letter "potty words" without running and telling our mommies. But each micro-blog post you make is going to be only a few words. It's neither classy nor mature to make 10% of those ten words a curse word. Some Internet marketers seem to think this makes them look cool. It doesn't. Don't do it.
What else do you hate about Tweeple?