Blogging

Ok, so I've revived my blog, but I am not at all sure what to do with it or why I have it.
I partly though to do it after an old friend sent me a link to her blog, but I have never told anyone I know that I have one. Now or in the past.
My real name isn't on it, but there are enough details about my life that I could be quite easily identified by people I know, although probably not to people I don't. I am consious the fact that it is public yet I suspect that I'm the only person who has ever read it.
So what is the point? I mean if I am blogging about blogging, does this mean I have nothing to say?