I myself used to believe ideas didn't matter that much, but I'm very sure that's wrong now.

The role of the board is advice and consent. If the CEO does not lay out a clear strategy and tries to get the board to set one, it will usually end in disaster.

... for the top twenty most valuable YC companies, all of them have at least two founders.

One thing that founders forget is that after they hire employees, they have to retain them.

I myself used to believe ideas didn't matter that much, but I'm very sure that's wrong now.

Once your product is working, switch from not caring about this to caring about this a little bit.

A third advantage of mission oriented companies, is that people outside the company are more willing to help you.