Just Think Happy Thoughts. This is a myth perpetuated by a plethora of self-help books. The truth is, focusing on solely positive thoughts drains our mental energy, thus allowing the negative thoughts that have us worried to take over our thinking. The best thing to do when we are experiencing pessimistic thoughts is to simply talk it over with a friend, confidant, or professional counselor. The act of letting it out to another person does far more for an individual than forced positive thinking.