Biggest Loser contest

Ok, so today I signed up for a biggest loser contest. Someone I work with knows someone who is putting it on and so I signed up ... $25 and the winner gets the pot minus $25 and second place gets his or her money back. The winner is based on the percentage of body weight lost. I weighed in at ... 209.3 (without shoes). I felt pretty good about this ... I mean I'm not happy to be over 200 lbs. but I thought I might be near 220. Ok so now I need to get serious about this weight loss thing. Also if you gain weight you have to donate $1 to charity for every lb -- and I believe that is for every weigh-in, not just an overall amount.