Foursquare's adoption of a game dynamic when it launched is a particularly clever implementation of a social hook.

Investing in management means building communication systems, business processes, feedback, and routines that let you scale the business and team as efficiently as possible.

There is a difference between hiring a CEO and turning over control of the business.

Most adults I know start their Internet session at Google, and most kids I know start their Internet session at either Facebook or MySpace.

I use beauty as a way of helping people to receive difficult or upsetting ideas. The topical issues are merely a vehicle for making one aware of one's own perceptual shift-which is the real thrill.

Facebook is not an unstoppable juggernaut. There are a lot of other things people can do on the web.

Ideas that most people derided as ridiculous have produced the best outcomes. Don't do the obvious thing.