The other piece besides focus for execution is intensity. Startups only work at a fairly intense level.

We hear again and again from founders, that they wish they had waited to start a startup until they came up with an idea they really loved.

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

You really want to know your cofounders for a while, ideally years.

The most important thing is that there is clear reporting structure and everyone knows what it is.

Whatever the founder cares about, whatever the founders think are the key goals, that's going to be what the whole company focusses on.

Firing people is one of the worst parts of running a company. Actually in my own experience, I think it is the worst.