These are some simple rules to include when your posting, so you don't look like an idiot.
Don't be afraid to ask questions- the only way to learn is to ask.
Don't argue with other people because you think there wrong-simply state the truth and provide facts to back it up.
If your not sure of something post it anyways-be sure to include "I may be wrong" or "Correct me if I'm wrong"
Be polite-people will be more willing to help you if you thank them for their time and help on the subject.
If you are proven wrong admit it-when you are proven wrong (like I have countless times) admit it. You walk away with a new thing learned and people will think more highly of you
Check your spelling,grammar, and punctuation- nothing gains you more respect then proper grammar,spelling, and punctuation, and remember people need to understand what your trying to say.
Follow these simple rules and you will be a great poster in no time.