Where's your head at?

You often hear the phrase in most sports that "this game is 90% mental". Doesn't really matter what sport you throw in there most will agree that without great mental focus and concentration it's almost impossible to compete at a high level in any sport. Very few people are so extraordinary that they just have this built in, most of us have to learn different techniques and really work on keeping our concentration sharp. I myself have on occasion used mantras, not sure why I did but I would look in the mirror and repeat the same thing over and over again. I stared at myself said over and over again that I was going to knock out my opponent before I did it. I believed it after I said it so many times I never thought about losing. Now mantras aren't for everybody, again still not sure why I use them but they work for me so i'm not stopping.
Maybe for you it's meditation. Sitting legs crossed concentrating only on your breathing and allowing the thoughts to come and go. I feel like this is a great way to center yourself and I know of a lot of successful fighters that meditate daily. It's also a good way to learn to control emotions which can get away from even the best fighter during combat.Prior to fights you can always see fighters sitting quietly listening to music. Some are pumping themselves up and others are calming themselves down but all are trying to find the best place in their head for the upcoming battle.
Some seek out a sports psychologist to help weave through the muck when training for a fight or even after a loss to help recover mentally and emotionally. Sometimes a set of unbiased ears to listen to thoughts about an upcoming event or past one can shed new light on those thoughts and keep you a little more centered.
Getting centered is very important. You'll often hear me tell people i'm training to, "find it...find it" especially in between rounds where its necessary to slow down your breathing and heart rate in order to refocus your brain and make adjustments for the next round. You must find what keeps you grounded because when you lose control you lose technique, power, balance, you start to leave yourself open to take unnecessary punishment and an almost positively a loss on your record.
Its the same in life as it is in combat, keep a cool head because "cool heads prevail"!