To Blog or Not to.... Never Mind

I'd like to start blogging in earnest. The chief problem with this idea is I'm not sure what I'd blog about. I need a solid blog idea or the blog will likely just end up... well, like this blog.

Should I do a flash fiction blog? Just write something every day or every week and put it up?

Should I blog about other bloggers?

A poetry blog?

I guess the issue is that I feel my writing talents are better when refined, and I'm not sure how to refine blog posts.

I might try a flash fiction blog.

Also, following other bloggers. Because, you know, how'm I supposed to get noticed otherwise?