Rule 1; take everything slow, acceleration, braking (it’s brAKing, people, not “breaking” that’s what happens when you slide off the road and hit a guardrail…), the “egg under the pedals” guideline is a good guideline, slow, steady and controlled
Rule 2; plan extra time for the commute, taking into account low-grip conditions, morons who think the laws of physics don’t apply to them, state plow/sand vehicles, accidents of all kinds, ranging from simple sliding off the roads all the way to multi-car pileups
Rule 2A; assume all the other drivers on the road are morons and are about to do the most clueless thing you can think of, right in front of you, oftentimes you won’t be too surprised when it happens
3; Grip is your friend, get the most aggressive, grippiest snow tires you can, and put them on all four corners, you don’t need the Überexpensive high-tech “Supersnows”, just a nice, blocky, aggressive tread, sure, it’ll be noisy on dry pavement, but it won’t easily bog up with snow, the tire will throw the snow clear of the tread as the tire rotates, I’ve driven on Supersnows and the basic, blocky snows and the difference is marginal at best, certainly not worth paying the premium for the Supersnows
4; If your car is a manual transmission, make sure you start off from a standstill in second or third gear (my Saturn Ion’s 2.2L Four Ecotec engine is capable of starting me from a dead standstill in third gear without straining or lugging, powerful little motor that Ecotec…) to keep the torque down, as that’s what causes grip-reducing/eliminating wheelspin, my co-worker’s DSG manumatic equipped VW GTI has too much torque for the snow, and he says he’s unable to start off in second gear, Heh, win yet another one for the manual transmission
5; in slippery conditions, braking distance increases dramatically, especially with ABS, so plan accordingly and brake earlier, plan for your car to slip or slide and react accordingly
6; when descending a steep hill, gear the car down to a lower gear and let engine compression help control your speed, when climbing a steep hill, keep RPM’s low to cut down on wheelspin, if the wheel(s) begin to spin, you’re losing traction, let up slightly on the gas until the spinning goes away, even if that means crawling uphill at 5 MPH
7; find an empty snow covered parking lot and practice emergency handling, deliberately slam on your brakes, to see how/where your car slides, manually induce fishtailing or spins, on a front wheel drive car, you can do this by yanking the handbrake on, put your car into a spin a few times and let it spin out so you can experience how the car behaves, then after you are familiar with the sensation, induce some more spins, but try to recover from them, practice often to keep your skillset up
…oh, and don’t mention that it’s fun to do as well…