Emotions
At 88 I'm an old man but it took most of my life to learn one simple truth. It's not an easy task but if you can take command of your emotions your life will improve. Most of the damaging decisions I have made over the years have been the result of
allowing emotion to override logic. Except in a few situations, anger, jealousy, fear, hate, grief or greed will lead to poor decision making. Humans are emotional creatures so the transition to logical thought and decisions may take most people some time but work on it and see the difference.