Lean thinking defines value as providing benefit to the customer; anything else is waste.
If you don't know who your customer is, you don't know what quality is.
The only person who can put you out of business, in the early days, is yourself.
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?