Web directories are a great way to get links to your website for free or for a cheap one-time fee. There are thousands of directories available of all shapes and sizes. SEO friendly directories are directories whose links will SEO benefit to help improve your SERPs (search engine rankings). To get a better understanding of directories I suggest visiting Best-Web-Directories.com. They have tons of SEO information. They offer great detailed rankings and reviews of free directories. They rank directories that approve site submission in a reasonable amount of time. They also run a SEO Directory blog, with advice, strategy and tips for site submission.
Best Web Directories also has a directory of directories with 4500 listings of web directories. They have thousands of free and paid listings. They also have thousands of niche and regional directories.
General directories have listings of a wide range of sites. Again, the general directories that you submit to should be SEO friendly. Ideally, they are edited by human beings to ensure that the amount of spammy sites is kep to a mimimum. CBravo.com is a great example of a general web directory. Another great general directory is Link-Exchange-Network.com. Feel free to provide your link submissions. Looking for more then visit Werner and Blank. You can submit your site by visiting the general directory submission link.
Deep links are backlinks to deep pages (internal pages) of your website. Your SEO strategy should include deep links has the search engines have gotten smarter over the years. Since a top quality website would not normally have most of its links pointing to its home page you should make sure that you have links to your internal pages too. These links will also help with search engine rankings.The Deep Link directory is a directory that lists only deep links. They want to eliminate much of the duplicate content that you have in most directories.
Legal Help is a legal directory offering legal information in a well organized directory format . They have legal info on a wide range of practice specialties such as corporate, family, crimal and employment law. Legal-research.net is a free legal directory. They have a wide range of law information including sites describing the services of united states law firms. On the subject of law, if you are setting up a legal website then have a look at these legal templates. They will make the job a breeze.
101-SEO-Resources.com is a search engine optimization directory that includes a wide array of useful SEO content. For example, their SEO glossary has great explanations of the often confusing SEO terminology. For fun, I can suggest the blackjack page of this games directory. For trip travel plannning, be sure to visit Book-a-Trip travel. This is also a directory that has some interesting travel content.
If you are looking for software, then visit DevMagic.com Software, a directory site dedicated to software tools and utilitiess. The Offshore Directory is an example of a very specific niche site. It is a financial site, with website listings related to tax shelters. An example would be banking tax shelters.