This is a great technique that I learned about from other bloggers.  Basically you use google blog search to find blogs that cover simillar topics to the ones you write about on your blog.  Pick a post they wrote and write your opinion on it, be honest, and if you don’t agree with their views state that in your post.  In your post make sure you link to their post, and also ping it (or do a trackback) if you can.  That way they will see your post and probably write about it on their blog linking to your post.  Their readers will be checking out your blog and will often become regular readers of your posts.