We pretty much won't fund a company now where the founders don't have vested equity because it's just that hard to do.

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

The best source by far for hiring is people that you already know and people that other employees in the company already know.

It's better to have no cofounder than to have a bad cofounder, but it's still bad to be a solo founder.

Losing focus is another way that founders get off track.

M&A negotiations feel really fun. This is one of the biggest killers of companies, is they entertain acquisition conversations.

Two other things that we hear again and again from our founders, they wish they had done earlier, and that is... simply writing down how you do things and why you do things.