Tommy said it nice and effective like, but just a rule of thumb a la Jeph's suggestions, "The secret to not being stupid is to ask yourself every time you go to hit that "reply" button, "is this something that other people would actually want to read?" ", and I try and use this whenever possible.
Edit: Yes, tommy wins again. His name should read: 'tommydsexyski', but your brain is uncapable of comprehending all that sexy and just shuts down.