Just do something that lights you up, and lights up your customers, and lights up the world and scale to that.

A book is always a dialogue with other readers and other books.

The Lean Startup isn't just about how to create a more successful entrepreneurial business, it's about what we can learn from those businesses to improve virtually everything we do. I imagine Lean Startup principles applied to government programs, to healthcare, and to solving the world's great problems. It's ultimately an answer to the question: How can we learn more quickly what works, and discard what doesn't?

When you have to prove the value of your ideas by persuading other people to pay for them, it clears out an awful lot of woolly thinking.

Think of how Wikipedia works, how Amazon harnesses user annotation on its site, the way photo-sharing sites like Flickr are bleeding out into other applications. We're entering an era in which software learns from its users and all of the users are connected.

You have to pay attention to money, but it shouldn't be about the money.

I think that Microsoft will increasingly feel margin pressure from Linux as well as people saying: well actually the applications that really matter to me are not on my PC. And so they're going to be able to extract less of a monopoly rent, so to speak.