... the thing we see wrong with YC apps most frequently, is that people have not thought about the market first and what people want first.

One of the keys to focus, and why I said cofounders that aren't friends really struggle, is that you can't be focused without good communication.

To get the very best people- they have a lot of great options, and so it can easily take a year to recruit someone.

Obsess about the quality of the product.

You also want people who are maniacally determined and that is slightly different than having a risk tolerant attitude.

If you compromise and hire someone mediocre you will always regret it.

A small communication breakdown is enough for everyone to be working on slightly different things. And then you loose focus.