Increasing blog stats through blog directories. Submitting to blog directories--and any other directories, for that matter--will help to increase your blog's visibility in search engine results, and thus increase the amount of traffic to your site. Make sure to submit to the relevant categories, as contextually relevant links means stronger links.
More links to your site equals better chances to rank higher in search engines. Getting links is part of what's called Search Engine Optimization, which will help promote your blog. In the eyes of search engines, links pointing to your site or blog act as votes for your site.
It will help to increase your PageRank and Alexa Rank, which would mean that you'll get better offers from advertisers(Project Wonderul, Tnx.net) and get better compensation for your blog posts(SocialSpark, Blogsvertise, PayPerPost). Here are some blog directories that you can submit to:
Boing Boing | A Directory of Wonderful Things
Blogs N Blogs
Blogs for Small Business
i Blog Business
Blog Lookup | Blog Directory
Blog Listing | The Fastest Growing Blog Directory on the Net
Blog Intro | Bringing Readers and Bloggers Together
All Blogs | Web Directory
Blogz BZ | The Official Blog Directory
The Blog Directory
Aviva Directory (paid)
Blog Universe (paid)
(visit this link for more recent updates on this list of Blog Directories)
Feel free to suggest any other good blog directories that you know of. For more tips on how to promote your blog, click here. For more tips on Search Engine Optimization, click here.