Derek Sivers's review of Drive: The Surprising Truth About What Motivates Us

Essential for all managers. Deep surprising study of motivation at work. Extrinsic vs intrinsic. Work vs play. When money is used as an external reward for some activity, the subjects lose intrinsic interest for the activity. See http://www.youtube.com/watch?v=u6XAPnuFjJc

Ref: https://sivers.org/book