Only hit with the knuckles in the circles, they are the strongest. Hitting with the others will break them. Keep your thumb the way it is in the circle with the arrow.
Kick for the crotch, rip hair, bite, scratch, throw dirt, etc.
DO NOT hit the forehead, only hit the face. Hitting the nose is extremely effective. DO NOT headbutt unless you absolutely know how to properly do it. Headbutting can be extremely effective when done right, my uncle has knocked people's teeth out with headbutts.
