My father has a mindset that, if you are feeling generous, could be described as 'wanting to be prepared for all contingencies,' and if you weren't, could be described as 'paranoid.' I learned to do a lot of things when I was young 'just in case.'
And, honestly, I think they are good things to know, and everyone ought to have at least a passing acquaintance with them. So here is an overview of what you might need to know if you were stranded in the middle of nowhere...