The longer you make your article, the fewer the people who will read it. Write postings you can be proud of Most people on Usenet will know you only by what you say and how well you say it. They may someday be your co-workers, friends, or bosses. Read your posting through before you send it to make sure it makes sense. Check your spelling.
Writing is an art that requires practice.
Don't expect people to read your article to find out what it's about. Some sites truncate the length of the subject line to 40 characters, so keep your subjects short and to the point. Think about your audience Try to get the most appropriate audience for your message, not the widest. It's considered bad form to cross-post a message to several unrelated groups. And asking a Unix question to rec.autos will not reach the people you need to reach.