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 hardest part is the grueling work of constantly being wrong.

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.

If we stopped wasting people's time, what would they do with it?

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

If we do not know who the customer is, we do not know what quality is.

The grim reality is that most start-ups fail. Most new products are not successful. Yet the story of perseverance, creative genius, and hard work persists.