How Mom Makes Money Online
SEO Tips
Submit Your Site or Blog to the Open Directory Project

You'll need to dig down the topic lists and submit from your category page. Bookmark that page so that you can check back. Take a look at your competition and fellow webmasters/bloggers in your field while you're there.

Find more information about being added here: http://www.dmoz.org/add.html

A side note: Google likes links in this directory, it has been my experience that a link here helps with your Google ranking, which makes sense. Each site is checked by a human and then that human is rechecked in a way that can make the listing very credible.