Pregame jitters usually stem from a fear of the unknown. Jitters can be reduced or eliminated several ways, including participating in an activity unrelated to the game-such as going to a movie, reading a book, playing board games, etc..Also, jitters can be eliminated by overcoming the unknown by concentrating on personal performance goals for the upcoming competition, or the coach can lead the individual or the team in anxiety relief activities such as relaxation and forced concentration.
I always just try to go hard in warm ups it keeps my miend off it and gets my blood flowing and its more. i know some of you gonna say "ya thats smart wair your self out b4 the game even starts" disagree if your warm ups are anything like mine you spend alot of time in lines.
i always set myself physically and mentally da nite b4 n the day of the game..i mostly start out with a prayer n listen to motivational music(jay-z,kanye west,big..etc)..sometin that i could get hype to where i dnt think about the jitters n am anxious 2 play.
I'm 62 and still get pre-game jitters. Yes, coaches have trouble sleeping before a big game. I try to make sure that my team is well prepared for the game. I try to know what the strengths and weaknesses are of my opponent and put together a game plan accordingly. However, until that ball is tossed into the air, I haven't found anything that helps me turly relax.