Krav Maga is a hand-to-hand combat system developed for the military in Israel. The moves are efficient and can help you defend yourself against a variety of attacks.
Greatist points out 4 Krav Maga moves that anyone can do. In the image above, the woman is stopping an outside strike to her head by raising her forearm inside the attacker's oncoming arm and simulatneously punching his face.
Other tips you'll learn from the article below include how to make a perfect fist and why you should kick the groin with your shin instead of aiming with your foot or knee. (When in doubt, kick the groin.) As pointed out in our basic self-defence moves article, always aim for the soft parts of the body that can't be strengthened.