Be a fitter - not fatter - Warcraft player

"This helps to prevent tightening of the wrist. You can also tense and hold your arm, then let it flop to the side. This way you're increasing blood flow to the area and loosening the muscles. Get up, stand with with your feet shoulder length apart. There's also neck stretching - try to tuck your chin in as if you're making a double chin and hold it for a couple of seconds."

Similar thinking to the exercises that are advised on plane flights –which you'll know of if you've ever left Azeroth for long enough to go on a plane flight.