Start-ups make so many mistakes that the challenge to identify the root cause of a failure is tough. But believing in your own plan is probably the worst.

Famous pivot stories are often failures but you don't need to fail before you pivot. All a pivot is is a change is strategy without a change in vision. Whenever entrepreneurs see a new way to achieve their vision - a way to be more successful - they have to remain nimble enough to take it.

Most entrepreneurs don't need as many customers as they think. A lot of people think 10 is too few for a sample. But if all 10 refused a product, why is that not enough? If you want 100, 1,000 or a million customers, you first have to get 10.

Eric Ries Quotes