1. Always sit up straight. Just because you are playing games doesn't mean that you can slouch! 2. Never use "Chicken Fingers or Spider Hands" to type! Hands Position all the time 3. For every 30 minutes that you are on the computer, give your eyes a quick 5 minute break.
This is how your hands should be all the time on the keyboard; if you move one finger up, go back to this position, if you move one finger down, go back to this position. Hands position all the time.