What the hell is a blog anyway. (Jan 2010)

I am still trying to figure out this blog thing, what should I write about? Up to now it has been random thoughts and such, is that what a blog is? Should I even have a blog if I do not know what a blog is? LOL Truth be told, I will probably be the only person to read it so the only person I am writing for is ME. Now is that what a blog is, writing for yourself? Oh well, I think that I will continue to put down my random thoughts and hope to learn from them at some point.