I got a number of good suggestions about setting up a three column blog. Thank you, one and all. I was poking around Wordpress when I had an a-ha! moment. Why didn't I think about this before? I googled "how to add a third column to Blogger template." This was at the top of the Google results:
Three Column Blogger
Since my current template is called Washed Denim, I chose the Denim Tutorial. I am not kidding when I say it was freakishly easy. All I had to do was change a couple numbers and copy and paste some pre-written code a couple times and voila!
Thank you, Dear Three Column Blogger! I love it.
Ps. I am working on my knife lecture. I also have pie to show you. Except I seem to have, uh, misplaced the cable to attach the camera to the computer. Once it is located, we shall discuss pie.