I know this sounds like a stupid question but if you make a website and forum, how do you attract people to the site and get them to sign-up?
Get better content.
Keep updating.
Add your site to search engines: www.addme.com
Place your site in signatures on all the forums you are a part of.
I am currently giving away case of Cobra beer each Monday. I have place up a advert on my home page http://www.shantibraintree.co.uk yet I don’t seem to get many hits any hep Please?
Try to make your site’s link appear on more sites. Be it homepage of your friends then.
More your site’s lik appears on other sites/homepages better the rank it will get in search, which would lead to better traffic. Also those sites will help you get some traffic
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LOL…hez rite, sell porn for loadsa traffic 
You can get traffic by trying a free traffic exchange service like TrafficSwarm at http://www.trafficswarm.com/go.cgi?56268…
or WebCentreSurf at http://webcentresurf.com/?27972
Try StumbleUpon at http://www.stumbleupon.com and add your site to your favorites.
You can try article marketing at an article submission service like http://www.ezinearticles.com and link back to your website in the resource box for your articles.
You can also comment on well loved blogs like John Chow’s or Joel Comm’s that allow linkbacks to your URL. Do a Yahoo Search.
Make a video and upload it to YouTube with your URL flashed on the screen. All of these are free.
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