Gratification
I went to an event yesterday for work--it was a barbeque and I was able to wear something other than a suit. There were people there who I hadn't seen in a few years, people who I spent a lot of time with at one time. It was a lot of fun when I realized that quite a few people didn't recognize me and I had to introduce myself.
Even better was when the look of recognition and surprise hit their faces.
It was great motivation to keep on the path to losing the last 40!