Create tools that enable people to make decisions at the same level, ideally, of fidelity that that you would make them yourself.

The key metric of whether you've succeeded is what fraction of your employees use that dashboard everyday.

I don't believe ever in shared office spaces. Peter talks a little bit about this, every good startup is a cult. It's very hard to create a cult if you're sharing space with people.

The key to culture is it's a framework for making decisions. And if it's baked into your culture, people learn how to make decisions across that culture without you ever saying anything. You never have to really do anything except watch and promote and move people around.

You can build the most important companies in history with a very simple to describe concept. You can market products in less than 50 characters. There is no reason why you can't build your company the same way. So force yourself to simplify every initiative, every product, every marketing, everything you do. Basically take out that red and start eliminating stuff.

If the Martians took over eBay it would take 6 months for the world to notice.

You really need to spend a lot of your time focussing people.