I have a calendar I got free from my bank. And for each week on the calendar i wrote down my projected weight for that week if I stay on track.
So every time I feel hungry or think of doing anything off my plan I look at that calendar and flip ahead to my birthday or my son's scout campout or other big events coming up and see what my weight will be on the scale if I stay the course. That future number helps me visualize why I am doing this and that it is attainable and will be very visible in the very near future

It gets rid of any desire or motivation I would have to go off my plan or cheat or skip an exercise.