Where has my will power gone?

Honestly where has my will power gone? I use to have pretty good will power. I was good with weight watchers and I managed to get me weight down to a more manageable level. I was even looking super fly on our trip to Italy for my 28th birthday, I turn 30 in about a month and a half. Well I need to get of my derrière and get back on the program. It is one of my things for 2008 that I want to find again. I just need to suck it up and go. I need to stop making excuses and take myself back into meetings. Honestly I need to do this to for me. I want to look in a mirror and think, "hey self there is a healthy looking woman" not my thighs saying "oooh chunky monkey sounds great!" Until last year when I was pregnant for the 3rd time in 3 years is when my sweet tooth arrived and took hold with a vengance. I can't seem to shake the little bugger.
Why is that my will power in the last 2 years has gone completely out the window? I'm thinking did I lose it somewhere? Should I retrace my steps? Maybe put flyers on telephone poles? Reward anyone.. I think I have a nickel and a piece of gum.
I'm not asking to be a size 6, 5'11 and look like Heidi "your Out" Klum. I just want to be a healthier me, a more toned me. OK under a BMI of 30 me. So as I sit here wondering why I can't manage to get off my duff and get myself healthy maybe someone out there can find my will power and send it back to me...