In general don't start a startup you're not willing to work on for ten years.
You have to be intense. This only comes from the CEO, this only comes from the founders.
At the beginning, you should only hire when you have a desperate need to.
A single mediocre hire in the first five will often in fact kill a startup.
In the early stage of a startup, hiring senior people is usually a mistake. You just want people that get stuff done.
The best people know that they should join a rocketship.