My personal guidelines (not rules) for Being Online have evolved to something like this:
1. Make things, and talk about the things you make.
2. Contribute ideas that, as far as you can see, would be missing from the world if you specifically didn’t offer them.
3. Spend a lot of time reading other people.
4. Throw points at people you agree with. Upvotes and twitter likes are free. Use dollars, too.
5. If you can’t think of anything to say, go make something tangible worth talking about.
6. Keep your feed weighted towards people who seem to follow these guidelines.
7. Be aware that, absent any truly original ideas, anything you would post with the motive of “being right online” is usually basic and shitty. Filter outbound material with prejudice.