I usually cross arms until I'm upsidedown hands at 9 and 3, then if I still need more steering input I'll switch to one hand stationary on the wheel and shuffle with the other. (picture one hand staying at 9 o'clock moving with the wheel while the other stays at 3 o'clock but doesn't move with the wheel).
I shuffle. I was tought to do this when I was doing my ambulance driving course, as a method to avoid tying yourself in a knot with a hand mic cord while driving and I have been doing it ever since. Occasionally I will palm the wheel when I am in parking lots, but that is about my only bad habit...... well bad driving habit that is.
I took me a while for shuffleing to become 2nd nature. Its deffinitly not something you can learn the theory behind and then immediately apply it to the track, its something you need turn into a reflex instead of something you have to think about.