This is a super awesome talk from Gabe Newell that Tom pointed out. It touches on a lot of different topics, from productivity to game economies to the very nature of corporations. I highly recommend watching the whole video closely.
Among other things, this has emphasized the point that I need to play more games. The bit about Na ‘Vi and Dendi making money via Valve selling virtual banners to team supporters is fascinating. I had no idea anything like that is going on.