Maybe you don't get enough comments on your blog. Consider posting to other bloggers blogs on a regular basis. Just choose half a dozen blogs or so that you really like and that pertain to your blog. Then go there every week and post some comments on the newest blog posts.

Once other bloggers see you posting on their blogs, they'll come over and start posting on your blog. Regular readers of their blogs will also want to see who you are and will come to your blog to check you out. They'll probably start posting on your blog too. Soon you'll have lots of comments on your blog, and more readers too.