I would say, as an entrepreneur everything you do - every action you take in product development, in marketing, every conversation you have, everything you do - is an experiment. If you can conceptualize your work not as building features, not as launching campaigns, but as running experiments, you can get radically more done with less effort.

The minimum viable product is that version of a new product which allows a team to collect the maximum amount of validated learning about customers with the least effort.

Using the Lean Startup approach, companies can create order not chaos by providing tools to test a vision continuously.

A startup is a human institution designed to deliver a new product or service under conditions of extreme uncertainty.

The lean startup method is not about cost, it is about speed.

Most companies are busy making their products worse, not better. Updating is almost always a disaster.

At IMVU, the cost of customer acquisition through our five-dollar-a-day AdWords campaign was less than twenty-five cents. Our revenue from those same customers was more than a dollar.