I have this blog as way to chronicle my efforts in the magics, and that's about all it does, though my reviews do see a good bit of traffic. Anyway I never thought of having a blog connected to my professional website (when I do finally get one). But whenever I visit to a magicians personal site, it seems all of them have a blog. With various levels of success in execution. A good few of them feel more like after thoughts than anything. I can't help but wonder if there's some unwritten rule or if some rumor went around before I joined the magic fraternity that says you have to have a blog. While I'm sure that done right a blog can help with the sales, a blog takes commitment. As I've seen with my own blog when I stop posting for long periods my view count goes right down the drain, and generally speaking most of the traffic happens in spike on the day where a post goes live. For the most part I think that the info in most magicians blogs would better serve them in other areas and they should ditch the blog otherwise.
Edit: A few days after typing this post a I found a link to this article in my Facebook feed. I have not read the whole thing but the basis of it is that if you want your site to appear in Google searches in 2013 a well executed blog will be essential.