I don't have a really active blog, but I am a web developer. This article:
http://www.lonniegardner.com/2008/09...-traffic-tips/
has a lot of good info on how to get a lot of traffic to your blog. You don't have to worry about all the details of the steps he suggests, but I would definitely follow the advice about the "pillar" posts, posting comments on other blogs, and encouraging replies to your posts.