Anything that has low certainty or has a lot of impact should be tested early.

Every leader needs to watch what teenagers or startup companies - or startup companies headed by teenagers - are doing today, because many of those behaviors will be mainstream behaviors tomorrow.

I find social media as fun and engaging as the next person, but imagine if all the creative talent that was pouring into finding increasingly clever ways for us to broadcast daily banality (and then serve ads based on what is learned) instead focused on some of the UN Millennium goals? The world would be a better place.

I think the most important thing to do is to recognize the fundamentally different circumstances of pursuing growth.

You have to chip away at it and shape it to let the winning idea emerge.

Companies get into grooves and they keep sharpening what they are doing, when in fact what they really need to do sometimes is to stop and do something completely differently.

Why do people do crossword puzzles? There's no reward for completing one, but some people just like the challenge.