Search Engine Forums, SEO Forum

Hello all i am the owner od http://www.chatroomforums.com/index.php and i was on alexa.com to check some stuff out and i notice some of my ''keywords'' and i was wondering how to get new ones up to replace the ones that are there? the only that are their aren't really related to my site. What is my best options to get it to fit my forums theme (teen forums , chat forums , free forums, etc)

Thanks

Ranking your keywords are make or break your website.