It would be neat if it was possible to hit a "tutor" mode with the Prius. That screen that gives all the messages could give you tips on how to achieve better mileage. E.g. "your braking is fairly aggressive; if you go lighter in braking you could achieve a substantial increase in MPG" or "You use AC a lot even when it's not very warm outside. Don't use it on cooler days and you'll get a minor increase in MPG" "You accelerate like mad," etc.