Free Directory Submissions
Directories are the logical place to start your link building campaign. They are happy to post your site to build their list or relevant results. Submit your site to as many web directories as you can. You can later refresh your information by re-submitting it, especially if content has changed. Free directories can take weeks, or even months to include your site. It is only necessary to submit your home (index) page.
Start with Google, Yahoo, MSN and the Open Directory.

Specialized Directories
Besides general category directories, you should submit to industry and geographically specific directories. These will help your search engine ranking and they can also drive targeted traffíc to your site. If you are a member of an association, the association website may include a list of members.

The state, county, region or city you live in may have a directory of sites for that particular area. Many will offer a basic listing for free with the option of an enhanced listing for a fee. http://www.Craigslist.org allows free advertising as long as you follow their guidelines.

Paid Directory Submissions
Annual subscriptions can be purchased for directories such as Yahoo, BOTW, and http://www.Business.com. They will add your profile more quickly than their free counterparts and are more likely to allow you to choose the title of your link. This gives you the opportunity to build your links according to your targeted keywords instead of simply the site name.

For example if your site is ‘ABC Lawn Co.’, a better ‘title’ in a directory or any other website would be “Grass and Lawn Mowing Service” since it directly includes several applicable terms. Paid directories may also allow deep linking to individual pages of your website so that particular search terms will automatically lead visitors to pertinent information.