Every word and technique mentioned already are sound and work. The variable in the equation is the individual them self. Everyones reaction to stimuli is different. There's even a famous shooter Doug Keonig who shoots the rifle stage of events wearing a full face motorcycle helmet. The most important aspect is your being aware of it! 90+% never are, and because of it never improve. You ARE NOT one of these!
Find the system that works best for you. Then once mastered, begin to teach others how to overcome it as well. You just never know when it might become really important for someone you know to be a REALLY good shooter!