One of the best ways to get back links is to write articles and post them to article sites.  The trick is finding good content and and finding a good place to post them.   I would recommend posting them to articles sites like articlealley.com.

Alot of people are so hung up on other ways of getting links like blog posting, link farming, link exchanges, and others.  But the single best way to get a high quality link to to write good keyword rich content and post it all around the web.  And its cheap, they have Free Content and Free Articles.

If you are looking for a site to post a Free Article or to build links… I suggest articlealley.com.