People that are really smart and that can learn new things can almost always find a role in the company as time goes on.

A board member of mine used to say sales fix everything in a startup, and that is really true.

... and you can only have 2 or 3 things everyday, because everything else will just come at you; you know fires in a day.

The most common post YC failure case for the companies we fund, is they're incredibly focussed during YC on their company... and after they start doing a lot of other things. They advise companies, they go to conferences, whatever.

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

The best ideas often look terrible at the beginning the truly good ideas, don't seem like they're worth stealing.

If you want something in a deal, just ask for it.