Some interesting article from Brian Tracy, you guys must like it.
Psychologists differentiate between an internal locus of control and an external locus of control.Your locus of control is where you feel the control exists in each area of your life. This location determines your happiness or unhappiness more than any other factor.
For example, if you feel that you are the primary creative force in your own life,that you make your own decisions, and that everything that happens to you is a result of yourself and your own behaviors, you have a solid internal locus of control. As a result, you will feel strong, confident and happy. You will think with greater clarity and perform at higher levels than the average person.