A good way is to post a tutorial. Another good way is to post something that the community can enjoy, like something funny, or something interesting or something important/security related. Just post something somebody will like, then you'll get antipoints for it. And remember, maybe you'll post something one person will like and give you positive antipoints, but that same post may be hated by somebody else and they may give you many negative points. Be careful about what you post, use common sense.