My daughters and I are starting a new series of challenges following the last weigh in. We will do 1 week challenges to keep the urgency up a little bit and to drive success. Neat week there are ten items related to the challenge. For each item missed $1 goes into the pool for an Amazon gift card. The items are:

Daily logging of everything eaten and calories. (MyFitnessPal ap)
Log an exercise three times during the week.

It is compelling with the shorter window of time.