David Sifry, founder of Technorati, offers some advice on breaking into the Technorati top 100 blogs list:
1) React quickly.
2) Make your posts easy to read.
3) Link, link, link!
4) Optimize for search engines.
5) Post, post, post!
Additionally, I would recommend writing compelling content. Here is the list of the current top 100 most popular blogs by link count, according to Technorati.