Guardian
Black Belt
Out of all the arts I've studied over the years, kenpo is the only one that actually has a curriculum for dealing with multiple attackers.
Some things I've learned from that are:
(1) Strike the closest attacker first and make it count. For instance a hard sword hand to the throat or a devastating kick to the knee...something that is likely to take them out of the mix quickly.
(2) Use your envirnonmnet. Position yourself so that there are obstacles between you and at least some of the attackers. Could be something material, or could actually be one of the attackers. Could be something as simple as putting your back to the sun.
(3) Make note of your environment. Look for things you can easily get to and use as a weapon; pipe, brick, rock, broom, bottle, fork, a handful of dirt...whatever...use your imagination.
(4) Move. Don't remain static; be mobile. Use your footwork
(5) Remain calm and focused.
(6) Take the first opportunity to escape to safety.
This about says it all for me also. Evade, strike and escape, it's a simple strategy, but effective. You can always CCP and carry.