The mother load of places to add your blog can be found by claiming your blog on your
Technorati

Technorati is also a great place to find other blogs of simliar interest to yours. But the key to using this community is done when you look at the tags other people are using in their blog posts. Or even the most popular tags . Then you try to incorporate them tags into your own blog if you can.

I will be doing more research on this technorati, but first to find out more information on authority status within the community see: techcrunch.com blog post

To make it easier to understand I would consider this a very valuable tool to see what others are doing that may help you improve your own blog. In the end you will improve your chances of making money online using your blog.