What better way to start writing about incentive models than a couple of videos that show the effect that transforming the mundane into something fun can have on peoples' habits.
In one case turning some stairs that ran alongside an escalator into a human-sized piano increased their usage by some 66 percent. And people enjoyed the additional exercise too. [youtube=http://www.youtube.com/watch?v=2lXh2n0aPyw]
Separately, 'enhancing' a regular park trash can doubled the amount of properly-disposed-of garbage compared to a similar one nearby. [youtube=http://www.youtube.com/watch?v=cbEKAwCoCKw]
The theory: Put the right incentives in place and habits will quickly change accordingly.
More on this at thefuntheory.com.