Alot of how you set yourself up on the road will depend on what you are driving and how confident you are in it. I always leave plenty of room infront and plan well ahead and expect the unexpected. If you are well aware of what's going on around you then you are better prepared for what lies ahead.
Braking for a junction will require steady soft braking allowing for ice and a slight lock up, worse if turning off a main road into a side road, the kerb can come quick quickly if turning in too fast! The worse thing you can do is panic and hit the brakes, after that you are a passenger until it stops of its own free will or hits something stationary!
4WD is fine if you are not too confident, but stopping is still a controlled effort especially if you are at the helm of two and a quarter tons! I found driving the Landy was fine, even changing lanes and kept it nice and straight when on fresh snow in the fast lane, all well and good if the road ahead is clear. Not recommended for 2WD as seen some drift a bit.
The biggest obstacle for me in this weather is not my own driving but that of others!