Mine was getting on a scale after I'd totally let myself go over the summer. I saw 198 and freaked out. It was that "Not ME. I'M not the kind of person who weighs 200 lbs! I'm too young to weigh 200 lbs!" And that made it pretty obvious that I had to do something about it. I haven't lost much yet...but then I've slacked off a lot lately.
I'm hoping that my dad's offer will keep me motivated. I have 38DDD breasts, and have wanted reduction for years. But it's expensive, and the verdict from my insurance (well, my dad's insurance) was "large but not abnormally large". Since I wasn't having to have bras specially made or do extensive physical therapy, they refused to pay for it. I was going to save up for it, but the cost is looking to be about $6000. I'm a college student. I can barely pay my monthly bills, much less save up $6000. I figured it would end up being one of those "maybe in ten years" things. But then my dad offered, that when I reach my goal weight he'll pay for the surgery for me. I need to make that a much more concrete reality in my mind for it to click...but once it clicks it'll be the best motivation I could ask for.

So that's when I decided this insanity has to come to an end. Now when I wear the 36.5 pants, my co-workers laugh so I don't wear them any more, they were put in the garbage. I'm done with 36 and soon I'll be done with 34's and never to return. I imagine I'll be at 30 and 32 and that will be just fine. It's funny, I knew I weighed over 200lbs but that didn't get me. It was how my clothes fit or didn't fit.
