A lot of people treat choosing their cofounder with even less importance than they put on hiring. Don't do this.

One of the great and terrible things about starting a start up is that you get no credit for trying.

If someone is choosing between joining McKinsey or your startup it's very unlikely they're going to work out at the startup.

Be suspicious of any work that is not building product or getting customers.

In the early stage of a startup, hiring senior people is usually a mistake. You just want people that get stuff done.

What being a founder means, is signing up for this years long grind on execution - and you can't outsource this.

Someday, you need to build a business that's difficult to replicate. This is an important part of a good idea.