***the word must between 550 – 600 words range!!***

To deal with self-control problems, many people pre-commit themselves to doing more of some good behavior or less of a bad behavior in the future (e.g., paying a large gym membership rather than paying per visit or alcoholics taking Antabuse before socializing). Please suggest a new (non-existing) product or service using prepayment (or some other form of binding pre-commitment) to help people with a self-control problem. Make sure to specify what consumer self-control problem the product or service is meant to help. How would you market this product or service to your target customers? (Hint: Think about where/when advertising would be most effective and to whom. Do not just discuss stuff you learned in marketing classes.)
You cannot write about gym, food/meal services, or textbook subscriptions.