Move around the field, don't just stay in one spot. If you're just reffing rec ball you don't need to constantly be in their face but do make sure they're not wiping or doing something wrong. If you're reffing speedball and tournaments you need to be moving around making sure you can see the front of most people on the field. If you think someone gets hit, or someone calls a paint check on someone, run there and check them out. I wouldn't call the player neutral because that just holds up the game, just check them out from the front and back and make sure there aren't any paint smears from wiped paint or anything. It's rerally not that hard, try to stay out of lanes though.