Check out various popular web directories.

List of Web Directories

Directory @ V7N
This directory lists only quality websites, and it sends some impressive traffic due to the placement of the V7N Directory search box on many, many high traffic sites.

SevenSeek
A professionally edited web directory, currently operated by the V7 Network. Submission is highly recommended.

DMOZ
Editors seems to suffer from paranoia in that if you own - or are affiliated with - more than one site, they might accuse you of spamming if you submit more than one site for review. Submit, but don’t get your hopes up.

Wow Directory
WOW is now an established web directory. Professionally edited. Submission is highly recommended.

AbiLogic
AbiLogic is one of the better submission rates today. Submission is highly recommended.

RubberStamped
Professionally edited web directory operated by Peter Da Vanzo. Highly recommended.

GoGuides
A volunteer edited web directory. Submission is recommended.

Skaffe
Another very active, volunteer edited web directory. Submission is highly recommended.

AnthonyParsons.com
A pay directory. Affordable and recommended.

Umdum
Umdum is owned by Loren Baker, and he’s done an awesome job of promoting this directory.

Yahoo! Web Directory
Most categories will cost $299 per year. It may or may not be worth the cost, depending on the category.

JoeAnt
A volunteer edited web directory. Become a volunteer to add your site.