Quick tips as an addendum:
A kick to the genitals is always a good first move. REMEMBER: You should be fighting to save your life, not to look cool.
If your opponent has good facial and lower-body coverage, try hitting the throat or the back of the neck. The former could leave your opponent incapacitated, while the latter hurts a WHOLE LOT.
Consider taking a self defnse class. Ju-jitzu, karate, and judo are good Eastern-fighting style options for self-defense.
When in doubt...run like the wind!