First, there is your character, what you are. Those are the elements that give your life substance. The second ingredient required for sound judgment is competence. Competence is not something that you're born with, it is acquired. It comes from experience, knowledge and technical skills.
Competence requires the development of an inquisitive mind.
Some people are highly inquisitive about other people's business. That's not what I'm talking about. The third element of good judgment is obedience to the Word of God. He keepeth the paths of judgment, and preserveth the way of his saints. One of the gifts I received this Christmas was a book that told how the iron curtain came down in Poland, Hungry, East Germany, Romania and Czechoslovakia.