Add your site to all of the following directories. These are different to search engines, you would add your site to a specific section so it works similar to the yellow pages. You can visit each one and add your site. You can get added to these for free but you may have to hunt around for the free options!
If you know any better ones or want to report a bad one on the list please contact us. We want to keep this list up to date at all times.