We need to reengineer companies to focus on figuring out who the customer is, what's the market and what kind of product you should build.

Progress in manufacturing is measured by the production of high quality goods. The unit of progress for Lean Startups is validated learning-a rigorous method for demonstrating progress when one is embedded in the soil of extreme uncertainty.

Vanity metrics are the numbers you want to publish on TechCrunch to make your competitors feel bad.

The only way to win is to learn faster than anyone else.

Leadership requires creating conditions that enable employees to do the kinds of experimentation that entrepreneurship requires.

It doesn't matter if you call it a boom or a bubble. The startup business moves in cycles, and what goes up will eventually come down.

By the time that product is ready to be distributed widely, it will already have established customers.