There is lots of useful stuff here. If your question is common, it is probably answered there. If you ask a question, read the newsgroup looking for answers. Everyone on the newsgroup is also a human being. Stick to the topic, and to your point.
Short messages are more effective.
Consider that sending information around the internet and storing it does cost. FTP large files outside business hours at the server site as much as possible. Keep messages short and to the point. When regular readers get tired of seeing the same questions over and over again, they write one of these. FAQs are usually posted to the newsgroups regularly.