You just begin. You do the math. You solve one problem...then you solve the next one. And then the next. And if you solve enough problems, you get to come home.
I'm in a Hab designed to last 31 days. If the oxygenator breaks, I'm gonna suffocate. If the water reclaimer breaks, I'll die of thirst. If the Hab breaches, I'm just gonna kind of implode. And if by some miracle, none of that happens... eventually I'm gonna run out of food.
All natural, organic, Martian-grown potatoes. You don't hear that every day, do you?
I'd get to fly around like Iron Man. Commander...let's go Iron Man.
So that means I'm gonna b, taking a craft over in international waters without permission. Which, by definition, makes me a pirate. Mark Watney, Space Pirate.