I didn't get into the challenge, but had hit the heaviest I had been and decided to do something about it last November. I started at 238 and am now 198. I limit my calories to 1500 a day, 400 bfst, 100 snack, 400 lunch, 100 snack, 400 dinner, 100 snack. I hit the gym 3 times a week for weights and cardio.
I know some of you may be a bit discouraged when your numbers don't drop as rapidly as you'd like, but just doing something positive for yourself is a nice reward no matter how fast the weight falls off. If you feel better physically and mentally you are already reaping the benefits.
There were weeks where I lost 1 pound on the scale, but with working out I actually lost 5 lbs of fat due to gaining muscle mass and lowering my fat %. Adding a "body fat analyzer" to the equation might surprise you and give you that extra motivation. They run around $40 and help with tracking your progress. And another thing, don't skip meals, eat smaller more often. And one other thing, don't waste your money on those Richard Simmons workout videos. They suck and I think he might be gay.