Many years ago, in ancient Greece, a traveler met an old man on the road and asked him how to get to Mount Olympus. The old man, who happened to be Socrates, replied by saying, "If you really want to get to Mount Olympus, just make sure that every step you take is in that direction."
The moral of the story is simple. If you want to be successful and happy, just make sure that your every thought and action are taking you in that direction. Sir Isaac Newton is generally considered to be the greatest scientist who ever lived. His breakthroughs in mathematics and physics laid the groundwork for the modern age. In his later years, he was asked how it was that he, one man, had managed to make such significant contributions to the world of science. He replied: “By thinking of nothing else."
In its simplest terms, success begins with you exercising your power of choice to take systematic, purposeful control over the thoughts you hold in your conscious mind. By rigorously disciplining yourself to think and talk only about what you want, and by refusing to dwell upon the things that you don't want, you begin your journey toward the stars.
This tidbit is from Maximum Achievement by Brian Tracy