How can I calm myself down while playing a game?

Most of the time when im playing multiplayer games, i'll get hyper and lose focus on the task which is winning the game ( It's one on one games, mostly soccer, basketball, etc. ). This goes the same for online and real life games. I was wondering if there's a breathing technique that I can do or a certain type of music that I can listen to while playing the game. It also has to have some type of rhythm so ill be able to play the game still.How can I calm myself down while playing a game?
listen to bob marley