There is some good avice here:
http://www.drivingfast.net/techniques/w ... niques.htm
From my "off-road" days I find that if you do get in a slide and balancing the motion in first gear on the clutch without stalling isn't helping, don't use the foot brake but use the handbrake, on and off quickly cadance style. Using the footbrake is only likely to increase the slide speed and all the ABS wil be doing is making a lot of noise. Whilst the ZEDs ABS will theoretically allow you to steer I have found that to keep to a preffered direction appropriate levels of handbrake leverage will also help to 'steer' the rear end, which you will not be able to do with the footbrake on.
All of this is only recommended at low speeds though as if the conditions are that bad and you are going too fast there's no helping you