Practice emotional detachment in everything in your life. Pause for a minute and evaluate if you really want to spend that energy in reacting. This includes all the emotions. We are manipulated by the society to react in a certain way over a period of time, most of the times if you evaluate, it is not your natural reaction. It has evolved over a period of time. If you look carefully at a child you will understand the natural emotional state of a human being. Observe the behavior of few children as a sample and identify the pattern. That's the natural human behavior. All our behaviors are social reactions and it is actually not serving the purpose of making us high performers. As you are constantly manipulating your emotions, your are cheating your own self. So you are in a failure mindset throughout the day as you are forced to behave in a certain way.
The sad part is you don't know that this is happening. It all happens in a matter of microseconds. To overcome this and become a high performer and express your true self, you need to have complete awareness over your reactions and emotions. Pause. Stay neutral without reacting and react only when you mean to. It will be tough to start, but over a period of time you will master it. Neutral, dumb, no reaction face is OK. Many won't accept your new way of life, don't fall prey to them. It is again a societal norms to carry a smiling face. Neutral is real. When you are born you actual cried. When you are peacefully sleeping your face is neutral. When you are very productive your face is neutral. And lot more. Think before you act.