7.

This I have learned.
Don't try to fight with empty hands if your enemy has some weapon. Pick up chopsticks or spoon, or even a pencil unless you can find a knife. In case you have some weapon, why do you have to give up using them? Your life is not a luxury stuff you may gamble for technique itself.
I learned that I should not rely on the just techniques of bare hands.
You should put yourself on the most advantageous position and drive him to most adverse condition. Therefore you should pick up some weapon although he has none. Moreover, you should keep even small weapon always.