I try. Im VERY small for my age. because of this, i seem like an easy target. i try to avoid em, but its like they stalk me! at least ill be out by next year.
Jab your fingers in their eyes, hit the bottom of their nose with the bottom of your palm( where it connects to your wrist) and push that up to break their nose or at least hurt them. Kick their knee straight on with your heel or the side of their knee. It even can break their ligaments if done hard/good enough.. but I wouldn't recommend that unless it's a serious fight. If you have long nails dig them into the attacker, if you don't you might wanna grow them out.. If it's guys attacking you, kick/punch them in "the area". If they are attacking you pretty seriously carry a key or something similar with you and put it between two fingers right next to your knuckles and aim for their cheek or other sensitive area. When blocking punches or hits, NEVER hold your arm(s) in front of you horizontally (left to right) Instead hold your arm(s) vertically (up and down) it has less chance to break or injure your arm, and if you can do it right, and hold your arm(s) right next to where they're going to punch, and keep your arm on the side of their arm, or whatever they're hitting you with, closer to your body, then you can deflect it away from your body. Elbow if they come from behind. You could also try to twist their arm up behind them so they can't move it, like police do :p Also, I saw on a defense show that putting your finger on that area between your nose and upper lip and holding it there/pushing it can hurt and make it impossible for them to move forward or something :p