These all sounded really bad, but they turned out to be good. If they had sounded really good, there would have been too many people working on them.

In YC experience, 2 or 3 co-founders seems to be about perfect.

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

Startups are not the best choice for work-life balance, and that's sort of just the sad reality.

Don't let the company get distracted or excited about other things. A common mistake is that companies get excited by their own PR.

AirBnB happened because Brian Chesky couldn't pay his rent, but did have some space.

Growth solves (nearly) all problems