You must be conscious to every possible action that may hit you aside from pondering how you can avoid an attack, which will take time. There is a need for you to fight as a form of self-defense. You can defend yourself by knowing how to make a fist. Punch your attacker's sensitive body parts like the nose and chin by flexing your knuckles properly to form a fist. After you delivered a punch on such parts, you will now have the opportunity to flee.
When your fists won't do the job, use the power of your legs. Aim for the most sensitive part of the opponent by giving it a powerful kick. Do it as high and strong as you can manage for a great shock and break free as fast as possible. Remember to focus your attention to your enemy at the same time be alert and mindful of your surroundings (consult this tutorial to learn more).
Most of the time, enemies do bear hugs to get a good grip that would let them dominate. In order to unleash yourself from the grip, just drop down, quickly squat and shift your hips sideward. You can strike a hard hit on the most vulnerable body part of your enemy when you do this. Don't be bothered about your attacker's condition after striking him. What you have to do is to escape from him.
Make use of your time wisely so you'll be able to pace yourself. With right timing, you can defend yourself properly. Self-defense is about what you will learn in the future and not what you know now. Take a look at tacticalgearexpert.com, an exceptional resource for you to be taught anything about self-defense and tactical accessories.