# Directories
Although it may seem an obvious and tired way to build links, directory use is still valuable and valid. I have compiled an exhaustive list of directories including PR, pages that have been spidered, and submission requirements for directories - see List of SEO Directories. When submitting to directories, make sure to vary anchor text and try to use your keywords in the description and title fields as naturally as possible. A good SEO should be able to obtain between 75-150 unique backlinks just from directories.
# Top Competition
This tactic can help you generate the most visitors to your site. Search Yahoo, Google, MSN and the other search engines for each of your important keyword phrases and make a point of attempting to get a link from each page. Oftentimes a direct phone call to site owners or a very tactful email can go a long way. I've even used handwritten letters to attempt to cajole site owners into giving me a link. Use whatever resources you have help persuade - links from other sites you own, money (if you have it), free SEO services, contributions of articles or content, etc.
When I use this technique, I'll typically make a spreadsheet listing all of the sites I have a shot at getting a link from (i.e. excluding direct, obvious competitors). I then get as much contact information as I can about each one and run down the list. This can be very time-consuming, but also exceptionally worthwhile. Even if your site doesn't get ranked much higher, each link from a site that ranks in the top 20 will bring direct, targeted traffic.