Directory URL :

As You Know Directory Submission Is a Very Important For Search Engine Optimization. But The Newbie Bloggers Don't Know How To Submit The Directories. They Have Make Mistakes In Directory Submission And Ruin The Blog/Website Rankings.

Directories vs. Search Engine Submissions :
Search Engines and Directories both allow you to run searches for web sites, but the results will likely be different due to the method they use to build their database of web sites.

Search Engines

Search engines use computer programs called Robots to automatically go from page to page through the web, reading content, and adding it to their databases. To speed up the process of getting your site indexed, they usually have a way for you to submit your site for indexing. You usually only have to tell a Search Engine the URL (address) of your site and it takes care of the rest.

Directories

Directories are run by humans who review web sites and categorize them within their directories. This leads to a more abridged set of sites which can good or bad depending on what you're searching for.

Yahoo and DMOZ are the two biggest directories on the web, but other important directories include local directories for your state, town, chamber of commerce, etc.

Due to the human editing of directories, there is usually a charge for submitting your website for review. Yahoo charges $299/year to be in their directory but DMOZ is currently free.

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The difference between a web directory and a search engine is that a search engine spiders (scan) the web for sites to include in their database, and they do not provide an indexable link back to your site. Directories however, are mostly human edited, and sites are usually reviewed before they are entered into their index. They also provide, in most cases anyway, indexable links back to your site, and this is what most search engine marketers are looking for in a directory, static indexable links that passes on Google PR.
List of great General directories: