High achievement always takes place in the framework of high expectation. In the long run, you'll always hit what you aim at. Your limits are nearly all in your mind. What you envision you can do, you can do if you set a goal and work daily towards it. Start thinking of yourself as a great athlete.
Success is a state of mind.
Believe in yourself. Know in your heart, that you can do the job you've set out to do. Set Big Goals. Each short-term goal must have action steps. They describe the steps that need to be taken to accomplish the short-term goal.