I like the idea of a controversial article or two, as long as it is of the type that will not offend visitors.

If you are in it for the long term, nothing beats quality content. So, be prepared to write, and write, and write some more.

Also consider participating in forums on your blog's topic. For example, our blog is about our home renovation and energy conservation experiences. So I joined some home renovation forums and energy conservation / environmental sites. But, in doing this we also learned a lot and are thankful to those who helped us in our renovations, energy conservation efforts and even in our blog design.

Hope that helps!

Thanks for giving me the controversial article idea!
Dan