Emmet Fox

I think the most important thing I work on is just my mental approach to every day, my mental approach to the game. How to come in each and every day focused, doing what I want to do, I think that's just the biggest issue.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.