A few weeks ago, I got home and I found this bill on my fridge. And was really surprised because there's never any bills on my fridge. So, I was wondering why my husband decided to put that on our fridge. And so, looking at the bill, I could see that what this bill was trying to do is get me to be more efficient with my electricity use. And how was it doing it? Social incentives, immediate rewards and progress monitoring. Let me show you. Here are the social incentives. In gray is the energy use on the average energy use of people in my neighborhood.