In 2006-7 I lost nearly 100lbs...then I went back to school almost full time while working full time and my diet and exercise went to shit and I gained it all back. After school, throw in a few knee surgeries, achilles surgery and an extremely demanding work schedule for a good while and I haven't gotten back on track since. However, in Jan I got fed up with being out of shape and since the end of Jan I've lost 25 lbs and still going so hopefully in a year I'll be back where I need to be. Been using myfitnesspal to track everything I eat, my workouts, etc which is really good for me and keeps me on track. At work they put in walking desks (treadmills that top out at 2mph with a desk attached to the front so I walk on there an hour at least 3 days a weeks (they book up fast) which is super helpful.