A great way to increase blog traffic is using the trackback feature of your blog.

Basically, a trackback is a communication to another blogger telling that you’ve posted something relevant to their post.

If you receive a trackback message from someone else, it means that your post was interesting enough to elaborate on it on their blog and you receive traffic and a backlink.
If you yourself use a trackback link, it usually appears as a summary comment and brings you traffic again. You can see that in action at famous Seth Godin’s blog (which you should read anyway).

Here’s is How to do a Wordpress trackback to get more links and traffic video.