It doesn't matter if it's black ice, glaze, refrozen runoff, hard pack, etc.; you're moving, and you've lost traction.
(1) Take your foot off the accelerator. It's not going to do you any good, regardless of whether you're driving a rear wheel, front wheel, 4 wheel, or all wheel vehicle.
(2) Steer in the direction of the skid. The idea is to get the steering tires rotating at the same speed the vehicle is moving at. That gives the tires the greatest contact time with any one piece of the surface and allows you to regain partial traction, even on ice.
(3) Evaluate your surroundings, fast. If you don't know your options, you can't make decisions.
(4) Prioritize your collision options. Driving off a cliff is the probably the worst thing, and shouldn't be chosen under nearly any circumstance. Striking a fixed, immovable object is the worst thing you can chose to do. (Concrete bridge abutments, trees, boulders, etc. Front ending a vehicle heading toward you is second. Glancing blow approaching each other, rear ending one, striking a moveable object, or possibly going into a lake or river are third. Glancing blow in passing is fourth. Running off into a field of snow is fifth. If people are what you're going to hit, then hit anything else but the people. And if you can't avoid them, hit as few as possible.
(5) Pray.
The best thing to do is practice doing deliberate skids and spins and recoveries in an empty lot with no curbs or things to run into. Play "What if" while driving. Plan ahead for what you would do under various circumstances. Make sure you have insurance, and your insurance card in the car. Cell phone or CB if you still have one.