One really important thing, BE SMOOTH. Don't jab the brakes or the gas, once you break traction, its much harder to get it back under control. This is where experience comes in, as you eventually learn the limits of the car.
You'll really want to practice in a parking lot if you're going to do much snow driving. I found with the auto that if I was understeering, giving it a bunch of gas would kick the back end out and allow me to slide it around a corner, rather than plow across the corner into the curb (however this will vary a ton as it was much easier with the turbo and snow tires, and takes a lot of practice).
Never slam the brakes unless its a last resort, if the ABS is engaging, you're braking too hard. You want to give yourself enough distance where you can brake lightly enough to not engage the abs.
Also even if it seems like you have enough grip, snowy weather is a bit unpredictable. It may be grippy snow with pavement underneath where you are, but 10 feet away may have glare ice hidden under the snow. Unless you have studded tires, nothing is going to really help you on ice, don't expect to stop or turn at all. Ice is the one thing that is really a hazard and requires the most attention.
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