At my previous job there were pretty sweet financial incentives based on points earned for wellness activities including monthly self checks, wearing seat belts, not smoking, annual checks, and physical activity. We had to enter points monthly and submit some evidence of the services provided by a doc (colonoscopy, mammogram, physical) and then we got cash at the end of the year. I forget how much, but it maxed out at like $300 or something. Entering points was easy, basically just a few more clicks in the same system with time entry and approval and they sent reminders. There were even points given for entering your points on time before the 10th of the month. By entering my normal activity I always got the maximum pay out.
They also ran weight loss activities where people formed teams and had group weigh-ins so no one would be on the spot with individual weight. My weight has hardly changed since high school, so I wouldn't have been much of an asset in that kind of game. I don't even remember what the prizes were.
Each day is a gift, that's why it is called the present.