The photo on the left seems like a nice way to start. It was created using a zany method that produces some beautiful results.
I'm sure someone's written a really good piece on why blogs have become so popular (if you know of one, please put a link to it in a comment). It seems to me there are some interesting historical points (in terms of the printing press, Marshall McLuhan, etc.) as well as sociological, political, even spiritual aspects.
My reasons for having a blog are as follows: 1) It's a very convenient way for me to keep an organized log of interesting stuff that will build up over time into a kind of database; 2) Someone else might find my stuff useful, informative, or entertaining; and of course 3) It's fun and creative.
Now, here's an interesting blog.