Create the kind of workplace and company culture that will attract great talent. If you hire brilliant people, they will make work feel more like play.

Entrepreneurial business favours the open mind. It favours people whose optimism drives them to prepare for many possible futures, pretty much purely for the joy of doing so.

We will eventually build space science labs and hotels, prodding the capability for missions beyond the orbit of the Earth. Our space-hotel guests will be able to take breath-taking excursions, flying a couple of hundred feet above the Moon's surface in small two-man spaceships. In time, we will launch missions to Mars and beyond.

Have passion for what you do; believe in yourself and your product and your customer; persevere; delegate; listen. Have fun. Today, I add: "Do good".

When you are starting a business or going down any challenging endeavor, you are bound to encounter challenges. You are going to hit many roadblocks and obstacles. These are obstacles that would make any sane person want to throw in the towel and quit. If you want your business to succeed, you can’t do that (duh).

There is no greater thing you can do with your life and your work than follow your passions – in a way that serves the world and you.

In the beginning it was just about the business - now it's about the brand.