Using paid advertising to drive traffic to your site
* Feed advertising
* RSS advertising
* Stream advertising
These are important things to focus on for your blog.
In online marketing in general, when you can find something people aren't talking about it probably works!
Co registration is another thing where you can build your email list for 0.50 cents - it still works because a lot of the bigger businesses use it. http://blogsuccess.com/gopremium