+1!!
This books approach to behavioral modification helped me kick start. 30 lb weight loss and a much more balanced approach to food in general. In Oct of 2010 I was 253 lbs. I was down to 218 lbs by January 1, 2011. Since then my weight has stayed around the same due to school stress, a slightly more lax diet and muscle gains, but I have never been more consistent with decent eating and regular exercise in my life.
I highly recommend the audiobook version so you can listen to it in the car or around the house. Some things, like the recommended workouts, don't make for good listening, but for me it's a minor distraction considering my improvements.