Probably the best 30 minutes of procrastination you will spend this week.

Very interesting talk by quirky Carnegie Mellon University Professor, Jesse Schell on the unexpected success of Facebook and other products. What about getting an Xbox achievement brushing your teeth or being on time at work? With comedic timing, Jesse Schell demonstrate the power of External Rewards.

and on the same topic, check the official EpicMix website and the related Kotaku article.
Level up and unlock achievements pins by skiing in Colorado