What Makes a Good Decision Maker?

If i have a coin and i know that it is a fair coin, so that it will and heads 50 % of the time entails 50% tails. But what i can never be sure of is whether it will land heads or tails on the very next flip. And that's what makes omeone a great decision maker, is being totally ok with that,. You must try to get as accurate an assessment of your uncertainty as you can in order to be a good decision maker.