One of the most important things I've heard from a teacher so far was just this weekend. Ray Farinato Sensei said something like, "all you need to do is get by the attacker." Basically, the idea was that even in the seminar, in a multiple-attack situation, you didn't have to throw everybody--it was "extra." You just had to get yourself to a spot where they were no longer a threat, and keep moving. . . don't fight people you don't have to fight.
(Yeah, I know: when you're practicing technique in the dojo, you need to meet the attack as prescribed, etc. But as real-life advice, this seemed pretty insightful!)