Make sure your posting has something to say. Only post if you have something to add to the discussion. Do not ramble. Keep your postings to the point. Remember many users pay to download your articles and really resent getting and reading a 100 line article that is a waste of their time.
Proper presentation is important.
Always use proper grammar and spelling. If you use a signature block that includes more than just your name, never include more than four lines. Avoid sarcasm and insults. You will look like a fool if you do not. Your inappropriate comments are sure to get you blasted.