What some people do to increase traffic to their blog is to interview people who are involved in your main subject matter somehow. For instance, if you write historical fiction, you could interview other writers in the genre, people who are experts on period architecture, clothing or weapons, editors who've been editing indie writers, etc. Those people will often get the word out about that particular interview, which might prompt others to request interviews or follow your blog, etc. The more of these things you do, the more people you have helping you get the word out about the blog.
The most-followed blogs offer information that others find interesting. That's why my blog is the very definition of epic fail.
