One of the biggest advantages that start ups have is execution speed and you have to have this relentless operating rhythm.

Move fast. Speed is one of your main advantages over large companies.

Aim to be the best in the world at whatever you do professionally. Even if you miss, you'll probably end up in a pretty good place.

You have to let your team get all the credit for all the good stuff that happens, and you take responsibility for the bad stuff.

The natural state of a start-up is to die; most start-ups require multiple miracles in their early days to escape this fate.

In YC's case, the number one cause of early death for startups is cofounder blowups.

Remember that the idea will expand, and become more ambitious as you go.