I agree with Snowy and tpl; the best suggestion is to just stay home when the weather is truly terrible. I'm typically asked to come along on our winter testing programs as a driver, so I don't always get a choice. It's always an interesting experience to head into northern Quebec in a convoy of vehicles where 2-3 drivers are Korean engineers who may have never driven in snow before. I'm tasked with running sweep to keep speed in check, yelling over the radio as required.
If you're forced to drive in bad weather, there are two general rules I find more important than any other:
1) Speed appropriate for conditions. Evaluate visibility and traction (both current and predicted), manage speed accordingly. If visibility is truly poor, DO NOT STOP ON THE HIGHWAY. Keep moving, even if it's slowly. Last year I saw what happens when you stop in white-out conditions first-hand, witnessing 30+ vehicles pile into one another on the opposite side of the 401 during February's winter storm.
2) Maintain an appropriate following distance. Gauge how long braking distances will be, and keep other vehicles out of that envelope.
It's not rocket science.
From those old pics from the Korean 'police action' Korea gets plenty of snow and cold weather....which does not, of course, mean that those engineers have ever had to drive in snow.
I wondered that as well. Is there that much difference in climate between North Korea and the south? (Frozen Chosin and all that)
They definitely get snow, but in my experience (however anecdotal), few of my colleagues from Korea have ever driven in it.
On our winter test we cover 2,500+ km in a week through terrible conditions, so we each partner up with a co-driver. My first year, before my co-driver took the wheel, I asked him if he'd ever driven in snow. Despite the language barrier, I deciphered this response:
Engineer: "Once, when I was in the military, I saw lots of snow. Three centimetres."
Me: "Sorry, do you mean 30 centimetres?"
Engineer: "No, 3."
Me: "Did you drive in it?"
Engineer: "I've driven in rain."
Since then on I've never surrendered the driver's seat on a winter test.