Here's a list comprised of the tools and techniques I used to promote this and other sites:
1. Twitter
Millions of people use Twitter, why don't you?
2. Forums
Target your niche of blog or site by joining the appropriate forum and post links in your signature.
3. Directories
Submit your site/blog to a link directory.
4. BlogCatalog
Connect with other bloggers and promote your blog.
5. Comments
Post comments on other peoples blog; chances are they'll post comments on yours.
6. Backlinks
Trade links with other webmasters/bloggers.
7. Dofollow