Like crazyroostereye and splashy have said, I would recommend joining the rings where possible, and then once you have done so it's great to click through the sites on the list and maybe leave some nice guestbook comments or follow the sites within the ring that pique your interest! I'm not making my site for numbers or exposure, but it can get a little lonely and I've found webrings are a great solution to that. As the others said, just follow any rules the ring may have listed and be respectful of members :) there's not much too it other than join and explore!