FitSense
Instapundit chimed in with this measure for exercise. I have/had one of these (the battery ran out on the sensor and I have yet to replace it) and I love it. The thing it provides is actual measure of what you're supposed to be doing. For a long time I would just try and go at 70 RPM for 20 minutes, but I had no idea if it was long enough, too long, too fast, etc. Which leads me into one of Chooky's recent blogs (and not just cause he references me):
http://chookyfuzzbang.blogspot.com/2005/04/iron-yuppie.html
He brings up a perfect point. Until a few years ago, we were supposed to be drinking 8 glasses of water a day. And fifty years ago, smoking was healthy. And a hundred years ago, so was cocaine and opium. And 500 years ago, so were leeches. Ok, so I do not think anything we're doing today is quite as bad as this... asymptotically I think we're getting closer to what true health is. However, Chooky's right; Without universally agreed upon measurements and clear causality between the measurements and health, unfortunately we would end up in a situation where we would have constantly moving and different measures based on the different plans. I wonder if this could be alleviated and combined with Chooky's idea of simply looking at the three most expensive types of people who have a treatable condition. Just as an example, if you are over three bills, you've got to find your own way to get coverage.