Whatsoever a man soweth, that shall he also reap.  As you work to train yourself to mentally look for the good, your life will begin to improve as a result of your change in mindset.  Crowd out all inferior thoughts by superior thoughts, evil thoughts by good thoughts, ugly thoughts by beautiful thoughts, and distressing thoughts by pleasant thoughts.  LEARN  to think constructively of all persons, all things, all events, and all circumstances.