Why now, why is this the perfect time for this particular idea, and to start this particular company?

You also want to fire people who a) create office politics, and b) who are persistently negative.

So it's worth some real up front time to think through the long term value and the defensibility of the business.

The best people know that they should join a rocketship.

So always keep momentum, it's this prime directive for managing a startup.

Growth and momentum are what a startup lives on and you always have to focus on maintaining these.

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