Before shaped skis, you had to have all of your weight on your downhill ski in order to carve a turn. Now, the best skiers are two-footed; their weight is more evenly distributed between their uphill and downhill skis. This technique works great in soft snow, but when it comes to skiing ice, the two-footed turn can lead to a two-cheek slide.
Click the slideshow below for the details.
Roll your ankles and knees as you grind those edges into the start of the next turn. Once you've got a good edge grip, resist the forces that try to pull you into the backseat and focus on staying forward so you can enter the turn with power. If you stay glued, you'll get into the next turn early and grip ice just like you'd stick to a groomer.