Lexi, APS and itsbob are correct. Getting a feel for your car in the snow in a completely safe situation is important.
Next time it snows, find a big empty parking lot such as Wildewood. (Make sure there aren't any of those big concrete parking blocks hidden under the snow.)
Lesson 1: Get up to about 20mph and floor the brakes. If you hear grrr and feel vibration through the pedal you have ABS and should stop quickly with little sliding. If you just slide, well you have regular old brakes like I grew up with and have to learn how to use them gently to slow down. So practice going between 25 and 40mph and massaging the brakes so you stop without sliding.
Lesson 2: Get up to about 20mph, spin the wheel to the right and give the accelerator a good whack. You should go spinning to the right, maybe all the way around. Do this a few times to get used to the feeling, letting the car just glide to a stop. Then try to correct the slide by steering into it, in this case to the left. (Don't use the brakes.) After about half an hour of this, you should be able to increase your speed to 40mph and slide your car almost sideways and straighten it out again on your merry way. Practice this until you can go almost sideways and recover without going off an imaginary road. If you have front-wheel-drive, a judicious amount of gas pedal will snap you straight even quicker. The front wheels will pull you to where you want to go instead of depending upon the front tires getting enough bite to overcome the inertia of the car.
Extra Credit: Roll all the windows down, blast 'Let it Snow' on the stereo, get up to 60mph, spin the wheel and floor the gas, laughing like a fiend.
A really good snow driver will keep the speed low enough, and the distance between cars big enough, that he/she will almost never have to use the brakes. (Brakes=slide in a non-ABS car.) They will also use the throttle to steer in a front- or four-wheel-drive car, even though that sounds scary.
BTW, your parking lot antics might get the attention of the law. If you tell them what you are doing, they will probably congratulate you on your foresight. Just don't have a half-drained bottle of Yukon Jack sitting on the passenger seat. Trust me on that one.