What's your rank?
That is to say, your amazon.com ranking? One way to measure the success of your blog book tour, is by checking your book's rating before, during, and after a tour. Comparing your rankings over the course of a month will give you a good indication of the tour success. Titlez.com is an easy way to get this information. Go try it out right now, and make a note of your ranking today. Then imagine what you would like your next book's rank to be!