psychology

http://en.wikipedia.org/wiki/Tetris_effect Ever played a video game so much that you've started seeing it everywhere?

http://en.wikipedia.org/wiki/Avoidant_personality_disorder Wikipedia on a personality disorder.

http://video.google.com/videoplay?docid=287148722109597025# A video showing how to take apart the GameCube.
http://www.npr.org/templates/story/story.php?storyId=5295168 A Harvard professor teaches a class about a system to follow to become happy.