One of the frustrating things of running a blog, is that you actually have to write stuff occasionally! I suppose nobody actually makes you do a blog, and it's questionable as to whether anybody is actually reading it anyway!
However, there is something in my head that says it's a good thing to do, not least because it can bring some level of catharsis to you. Actually, I needed to check the word catharsis, as I was more inclined to use the word cathartic. Of course, what I am trying to say is that a blog can be a cleansing experience of all those things that are rattling around your head.