Don't concentrate on back links. Back links are not the be all and end all of SEO.
First thing to concentrate on is things you can directly control on your site. This means doing on site SEO.
Grab a copy of
Market Samurai and use the SEO Competition tool to compare your site to the competition. Then do as much to your site to improve it's chance of ranking.
Only after doing on site SEO should you start worrrying about back links and other SEO strategies, as a site with thousands of back links can rank poorly if the basics are not taken care of.