The power of incentives - weight loss edition

About a month ago, I promised my students that if I didn't lose 7 pounds in about 2 months, I would pay them $100.

My initial weight was 212.5.

After a bit more exercise, along with eating smarter (apples for snacks, salads at fast food restaurants, etc.), here was my weight today (26 days later):

I won!

Incentives are powerful.  Yet, I'm thinking of doing something more.  I'd really like to get down to 195-197 range on this scale (I'm fully dressed, with shoes, on this scale), so perhaps I'll offer to pay them if I can't lose a few more pounds.