You always remember two things: performance and soft.
If regular performance on dry road is 100%:
rain: 60-70%;
snow: 40%;
ice: 20-30%;
Everything must be Soft:
Soft gas pedal;
Soft brake apply;
Soft turn;
...
The other things are:
Inspect road condition, specially night;
Never drive on ice road and snow on ice;
Keep more distance 3-5 times than regular;
When right or left turn, make sure more space;
Do not drive in bad weather and road condition. If you are out, wait, or call taxi.
Before leaving, check weather forecast;
100% make sure, safety first. If you do not have any experience, try many times on low traffic raod with snow.