Directory Submissions are beginning to be thought of as a tool of the past. Google has gotten stricter when it comes to acknowledging specific directories. Despite that, they are still beneficial for PR and traffic gain. There are many different types of directories that can be of great value to your website or blog. Check out the article at Search Engine Journal for a list of directory types and descriptions of each. You will also be able to find a list recommended directories for submitting quality content. Avoid directories with lots of paid advertising or skammy content. Focus on descriptions and tags when filling out submission forms. Detailed titles and relative tagging optimizes brand awareness. Sticking to your niche market and being selective of quality directories will permit positive results and improve link building.