1) Don't cause trouble on other sites that's not positive promotion.
2) Make posts on small/local forums that won't mind if their users hear about us. (or any forum that does not have an issue PM that sites admin to be sure)
3) Many forums have a spot for "homepage" or "webpage" in your profile add this site there. People will see it and it provides links to the site to help get us ranked in google.
4) If you have a website add a link here.
5) Tell your 3S friends. Don't message random people. Some people don't like that and consider it Spam.
6) Post a link on your myspace/twitter/facebook page.
7) Join the facebook group I will get to a myspace page.

Facebook group
www.twitter.com/3SGTO

The important thing is to spread the word in a positive manner never let the site get associated with something negative.