Even if I know some of the answers to the question I am not good at following them myself.
I guess a simple answer would be to excercise. I have been told that some GM run a marathon before a big game.
Also drink water even if you are thirsty to prevent the brain from signaling it is thirsty.
meditate is also important.
I need the advice myself so If anybody knows how to improve concentraion please post!
Hello. I'm working permanently to improve my chess... studying openings, strategy, endings and training tactics. But at the time to play OTB tournaments, all eforts goes to garbage because I have days of good concentration, and others days of nothing of concentration, playing patzer like a beginner. What do you recommend me to improve concentration during a OTB game/tournament?