Put your goggles on before walking onto the playing field and never take them off while on the playing field. It is also advisable to wear a mask that gives you full head protection. One shot in the lip or ear can ruin a day of paintballing. Always carry a barrel squeegee and a rag with you when your playing paintball. A squeegee is the best way to clean a gun barrel due to a paintball breaking in it.
Wet barrels make paintballs fly erratically.
Use your rag to wipe off the squeegee when done with it. Most of the time it is not the gun nor is it the paintball that is causing the paintballs to shoot incorrectly, it is due to a dirty gun barrel. When the whistle blows to start the game you can almost bet that the person coming at you is a player from the opposing team. Be cautious when playing so that you don't shoot your own team-mate. Always be aware of who's around you.