If you feel the consept of separation of your mind (brain) and your soul, you can make decisions by hearing the voice of your soul, live by heart. It takes some time to tune in to this way correctly, so I highly recommend meditations to feel yourself holistic and clear from physical reactions.
The book Emotional Intelligence by Daniel Goleman helped me in this, opening my eyes to the fact that I often live in the reactions of the animal brain (cortex), which triggers the selection of thoughts and judgments in the neocortex. And if I don't like these thoughts, I can argue with them and question and criticize them.