The man is injured and stranded on Mars, at every step of the way he identifies the biggest barrier to his survival and works the problem then moves onto the next one and works the problem. You dont have a giant insurmountable mountain of problems. They just look that way. Watch the movie, look at how hopeless it was when taken as a whole and then watch him knock his issues on the arse one at a time.
Then sit down and make a list, then pick one and work the problem.