Your brain is much like a complex computer. What you think about is based, largely, on what you put into that computer. Successful people are careful about the things they allow into that “computer.” With the right inputs, success is the result. So how can you go about changing your inputs? First be a knowledge seeker. Constantly be on the quest for new knowledge. Then, fill your mind with the thoughts of successful people. This means spending time talking to them, reading their writing, listening to recordings of them speaking, or anything else you can do to fill your mind with their thoughts.
Source: ACX audition script that has since been deleted so the authors name is unknown and could not be credited.