Excellent performance comes from investing in your natural talents to develop them into strengths.  Traditional self-development focuses on fixing areas of weakness to become more well-rounded.  This expends a lot of energy to achieve average performance.  
If you truly want maximum performance and greater personal success, you need to understand, then invest in your greatest talents.

Gallup research shows that people who operate in their strengths are three times as likely
to report having an excellent quality of life and are six times as likely to be engaged
in their jobs.