I think that a basic understanding of some concepts of (micro)economics is very helpful, e.g. knowing about excpected value; marginal utility and the fact that

I think that a basic understanding of some concepts of (micro)economics is very helpful, e.g. knowing about excpected value; marginal utility and the fact that it is often decreasing; and pareto efficiency. Also, two insights from computer science that are applicable to many areas of life: ducktyping ("If it walks like a duck and it quacks like a duck, then it must be a duck") and the fact that context switching takes a lot of ressources.