Other than over-all health. That is definitely the top reason to motivate you.
Do you have a future event, birthday, anniversary, party, reunion, vacation etc?
I tried losing weight numerous of times, and failed. The thing motivating me is my 7th year wedding anniversary vacation. Dh and I are going to Walt Disney World for 6 nights. I want to be able to truly enjoy myself and not stop myself from doing anything because of my weight. I want to enjoy the pool area, and not worry about what I look like in a bathing suit. I knew about this trip 2 years ago, I just wish I would have started sooner!!
Another motivater is my dh told me he would pay for a tummy tuck and boob lift or boob job (whatever I want) after I lost the weight, that really motivates me (these are things I want and asked for )! We set a date for Jan 2012. That will give me enough time to reach goal.
I am just interested in what helps everyone, is there a certain thing or event.