Anyone interested in driving lessons should look into some of the performance/racing driving manuals. They are very informative when it comes to car control, and though they're tailored to track driving, the info is useful anywhere. While pumping the brakes is an accepted and taught method, it is used improperly many times. You can't just apply and release the brakes going from lockup to no braking pressure and back without understanding how the contact patch of the tire works. Keeping the wheel near lockup, even on ice, involves much less variation of pedal pressure than just pumping the pedal. Another good thing to understand is the "circle of traction". Imagine a circle divided into quadrants. N being drive, S being braking and E,W being right, left respectively. If all of the tractive effort of the tire is going to brake, then none is left to provide lateral control. This is why ABS provides strg. control, or the ability to stop straight. It limits the tractive effort put toward braking and leaves some left over to maintain directional control. That is why if you can learn to brake at the threshold of traction, you can outstop ABS, although maintaining directional control becomes more difficult.
While I have never spent time on a track, reading about these theories has given a whole new perspective to offroad driving also. Off camber, slippery, technical terrain gives you plenty of opportunity to practice these skills and has only made my on road driving better.