Positive thinking is at the forefront of every great success story.  The mind must believe it can do something before it is capable of actually doing it.  So be aware of your mental self-talk.  We all talk silently to ourselves in our heads, but we aren’t always conscious of what we’re saying or how it’s affecting us.  Start listening to your thoughts.  If you hear negative thoughts, stop for a second and replace them with positive thoughts.  As the Dalai Lama once said, “The way to overcome negative thoughts and destructive emotions is to develop opposing, positive emotions that are stronger and more powerful.”