People work better when they know what the goal is and why. It is important that people look forward to coming to work in the morning and enjoy working.

If you get up in the morning and think the future is going to be better, it is a bright day. Otherwise, it's not.

I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.

There have to be reasons that you get up in the morning and you want to live. Why do you want to live? What's the point? What inspires you? What do you love about the future? If the future does not include being out there among the stars and being a multi-planet species, I find that incredibly depressing.

The space shuttle was often used as an example of why you shouldn't even attempt to make something reusable. But one failed experiment does not invalidate the greater goal. If that was the case, we'd never have had the light bulb.

I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better. I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.