Always make your posting a 2 way conversation. Include lines that require feedbacks/opinion. Dont just make an article that explain about something and put a period there. Comments will come after
Have you thought of attracting people by guest blogging? Like blogsitter can help you find bloggers that will do a guest post on your blog. That way you will have the chance to take a portion of the guest blogger's readers.
Is your blog a "dofollow" blog? If you configure your blog so that the comments are able to be followed by spiders, advertise the fact and you will get more people commenting. (Put a "u comment - I follow") logo on the blog, for example.) Once you have disabled the "nofollow" tags, list your blog in the "dofollow" directory (www.dofollowblogs.com) to get some comments coming through.
I personally don't like commenting on blogspot sites. I don't like the way you have to be registered to post, and how you go to a rubbish page to comment and ugh, I just dislike the current system. Wordpress is much more elegant. There's also great plugins which encourage commenting, like http://www.pfadvice.com/wordpress-plugins/show-top-commentators/ Do what I did, switch over to a wordpress powered blog
Maybe you should offer aaaa......how to say.... more tempting prize A good idea is to offer a free design to your readers accompanied with e-books giving them the latest scoop on making money on line. I don't know, something like this.
http://forums.digitalpoint.com/showthread.php?p=4446083 I did not get comemnts b'coz of a mistake in above link..
I did all of the above tips, got some comments but once in a while most of my posts are comments free, I think I will just disable comments .