1) If you're running hi-performance Summer tires, get you a set of all-seasons at a minimum; if you have the money, buy a set of rims and snow tires. I've yet to drive on any Summer tires that have been anything but horrid in snow/ice/slush.
They REALLY do help that much and make driving on the nasty stuff far less challenging.
2) Start off in second. You might have to ride the clutch a bit, but it keeps you from sliding all over the place when starting to move. Low-gear torque sucks on ice...
3) Brake EARLY and often! Don't slam on the brakes, even though ABS will help keep you lined up; it can only do so much.
4) Drive slow.
5) PRAY that you don't have an idiot that doesn't follow 1-4 behind you...
All are common-sense rules; I'm sure I'm not telling you anything new here.
