In leagues develop your awareness of your alter-ego, the little voice in your head which runs you down, the negative thoughts that help induce pressure. You needs to stop the negative thoughts and replace them with positive thoughts. If you suffer from pressure incorporate this as part of your goals . If you have no nerves you are too comfortable and need to psych-up. All actors and musicians relate to the nervousness before performing.
Nerves are a natural part of the bodies self-preservation instincts.
Of course, feeling too nervous that you cannot peform is no good, so you will need relaxation techniques in those situations.