Of course, the useful of all this depends on the time where (when ?) one ends up landing in.
- · Excellent physical fitness
- · Ability to run quickly, jump without hesitation and climb rocks and trees
- · Immunity good enough to survive without soap/ disinfectant
- · Basic knowledge of hand to hand combat
- · Enough common sense to build basic tools and weapons
- · Idea of what plants/roots/seeds/fruits are edible
- · Some basic skill that you can use for mingling in a community, like pottery, sewing, farming, accountancy etc. (providing that you encounter any human colonies at all)