You generally know when someone asks you to do something- am I more writing, or am I more editing? The editor is the best metaphor for your job.

There are three things you need to do as a CEO-founder. Think strategically, drive design, and drive technology. Some people who are really good at one can build a pretty foundational company. Most people who are very successful are good at two. But Jack is the only person in the Valley I've met who's all three. He's a first-rate strategist, a first-rate designer, and a first-rate technologist.

Build a company that idiots could run because eventually they will.

The companies I have traditionally seen do best over the long term had lead investors for their seed rounds

Don't accept the excuse of complexity. A lot of people will tell you, this is too challenging, this is too complicated, yeah well I know other people simplify but that's not for me, this is a complicated business. They're wrong. You can change the world in 140 characters.

The more you simplify, the better people will perform. People can not understand and keep track of a long complicated set of initiatives. So you have to distill it down to one, two, or three things and use a framework they can repeat, they can repeat without thinking about, they can repeat to their friends, they can repeat at night.

The first thing that editor does is they take out a red pen, or nowadays you go online, and they start striking things. Basically eliminating things, the biggest task of an editor is to simplify, simplify, simplify and that usually means omitting things.