Strength of will, is essential to your survival and success. The competitor who won't go away, who won't stay down, has one of the most formidable competitive advantages of all. In evaluating people, I prize ego. It often translates into a fierce desire to do their best and an inner confidence that stands them in good stead when things really get rough. Psychologists suggest that there is a strong link between ego and competitiveness. All the great performers I've ever coached had ego to spare.