I'm enjoying Jonah Lehrer's How we Decide. I'm currently on the chapter looking at the role of dopamine on our thinking. Getting a hit from dopamine is what gets people addicted to intermittent positive rewards - think fruit machines or World of Warcraft. This makes our thinking quite non-rational, for good or ill.

On the good side, I guess we might consider this bottle bank.

Hat tip: A tweet from Christian Heilmann