Submitting to directories is an easy way to get some decent backlinks. In my opinion, directory submissions are a bit “old school” and not as effective as they use to be, but are still worth your while, especially if you just focus on the top directories. Besides finding niche specific directories, here are a few worth checking out:
http://www.dmoz.org
http://www.webworldindex.com
http://www.worldwidewub.org
http://www.joeant.com
http://www.411.com
To see me talk a bit more about directory submissions, please view Video