Ways To Increase Traffic
Well almost everyone that has a forum is always looking for ways to get more page views and members, there are many ways to advertise your site, some are good and some are bad.
I always try to join as many forums that have a "Show Off" or "Post Your Forum" section like Forum Finder and Anything Forums. But what I do suggest is post around first, make a few good post, and if they don't have a "Show Off" section its like my friend PChuck always says "You always have a signature" and he is right. A signature is even more effective than a Show Off section because it shows up in every one of your post. And it does not have to be a forum the has a show off section, you could join a support forum of a topic you know about and help people, they see your signature and maybe they go and check out your site. Also when you advertise in your signature make good use of BB Code to hyper link your forum, those long links don't look good.
Also to advertise your site you always want to be in search engines, like Google, Yahoo and MSN. These are the links to add your site in Google, Yahoo and MSN. But when adding your site in Google, the Google Bot will collect a small amount of information, a great way to get the Google Bot to stay in your site more, visit more frequently and collect more information is Google Site Maps
You can also try to convince people and members of your site to link your site to the other forums their members of in their signatures. A great way for this is a UserBar, you make a userbar that has the Logo of your site or the name of your site and hyperlink it using BB Code
If you want a more detailed explanation on how to add your site in search engines, read this article entitled Publicising Your Blog
Just some helpful tips =)