The William James zone is the positive feedback loop of mental and physical anger responses which keep you a person even after the conflict has been addressed or resolved. I find myself in the WJZ sometimes when I remember or anticipate something which made/would make me angry, even when no conflict is presently occurring. This happens primarily when I don't have a ready distraction from the upsetting thought, e.g. when I'm in the shower or waiting to fall asleep. Other than simply waiting for it to pass, how can I get out of the WJZ or avoid entering it?

So far, the only mitigating factor I've found is my overall physical and mental state. Being hungry, tired, or stressed makes it easier to fall into the anger cycle and harder to get out. Therefore, taking care of myself in general helps to prevent it, but it's not always possible to remedy those problems after the cycle has already started.

Maybe the thing to do is direct the physiological arousal to another end? You're all revved up, so go get some exercise, or something?