Learn better posture
Poor posture means your body has to work harder to keep you up, which leads to fatigue and possible injury. Good posture reduces strain on your muscles, letting you game for longer at a higher performance level. Good posture has also been shown to improve cognitive function through improved physiological function. So what is good posture? To put it simply, you want your body to be as neutral and relaxed as possible, that means you should sit up straight with your head back instead of hunching forward, keep both of your feet firmly on the floor, about shoulder width apart, and your arms in a relaxed neutral position. For PC gamers, it can help to tilt your keyboard in slightly when gaming for a more natural wrist position.