In the 4-5 years since, I have kept most of the weight off by exercising 2-3 times a day and eating mostly natural, whole foods (no processed crap). I don't worry about how much I eat so long as it is good food made by Mother Nature like fish, meat, nuts, yogurt, eggs, vegetables, olive oil, wine, beer, raisins etc. \
If you have trouble motivating yourself for exercise, get a dog. An active dog. This will ensure that you get out there and walk 2-3 times a day. I have an Australian Kelpie that is bred to herd sheep. If I don't walk at least 6 miles a day with it, it freaks out and tries to hump my leg. That's the kind of motivation that I need.
Anyone who has trouble motivating themselves for exercise should think of playing a rigorous team sport they enjoy. When you enjoy it, it's easy to overlook the fact that it's even exercise.
I once lost 12 pounds during hockey training.
That's 12 pounds IN ONE DAY, mind you . . . while playing roller hockey outside for 6+ hours in 95-degree heat one summer -- and despite drinking about four gallons of water during that time, too.
Kids, don't ever try this at home. LOL.