Bring it on!

So, I can't seem to get BOTH the diet and exercise thing going. I'll get the diet going good, but can't seem to get the exercise part. Now, I've got the exercise part down, but my diet has been horrible. I think I just need some motivation.

In steps the challenge: Becky says she wants to loose 2 pounds a week for the next 5 weeks. I figure, if she can do it, so can I. A wager is made. Looser has to watch the other's kids for a night. Even though she has 4 kids, I have a 2-year old, which is like watching 3 kids, so a fair deal. Is that motivation or what?

I'm thinking maybe instead of the number of pounds lost, maybe percentage, especially since I have more weight to loose and I'm a bigger person. Percentage is fair, but I also think it's important to keep up the weight loss for the whole 5 weeks. So maybe whoever has the best weekly percentage average? Details, but bring it on!