"438 Days" by Jonathan Franklin
What you definitely need to survive: - a bit of luck (the only thing that everybody has) - humour (probably the most important factor) - imagination - inspiration - improvisation - someone to take care of (even if that someone is not there with you) - a natural mechanism that tackles all the small, solvable problems first - being able to see the end of your problems What you don't necessarily need to survive: - faith to a deity What you definitely don't need: - pessimism