This is an excellent introduction. Introduction to what? To the art of making decisions. For me there are two techniques. One is developing intuition by keeping a journal. There I record feelings in my body before making the decision. I consult with the journal later to determine which body cues matched with proper decisions. The other method is more logical and is called a prioritizing grid. You can find out how to do this by checking it out on a search engine. It involves writing down all of the elements going into making the decision, then comparing them two at a time. At the end you will have a prioritized list of the elements.