We ironed out the details and started our fitness challenge today. Each team has 2-5 people. For 7 days, everyone earns points for certain positive things they do each day, like one point for every 32oz of water we drink, 1 point per mile walked, 1 point for each half hour exercising, 1 point per fruit/veggie eaten, etc. The thing I especially like about this challenge is that it will change our habits in the long run, simply because that's what we're tracking.
I printed off a tracker today and just having it with me made me check in on the healthy habits more often throughout the day. I can definitely see this challenge being successful in the short and long term!