Search on Google for the keywords related to your content, and visit the sites that come up. See if you can exchange links with them. Also see this thread: http://forums.digitalpoint.com/showthread.php?t=18317
I created a quick tool to do this. To my surprise it has become quite popular. Inbound Links - Finding Sites to Link to You
- you went to their forum and put a post there with a link to your site - you submitted a press release that they published - you submitted an article that they published - you bought a link from their site (e.g. you pay them to link to you)