NO sudden movements
Plan ahead, remember your car will follow your eyes.
Defensive driving is a must, don't trust the other guy, react appropriately
Always know your options if an evasive maneuver is needed
Slower than usual but too slow can be bad. (don't become a hazard)
Find an empty parking lot and get feel for the car's reactions to starts, steering, braking etc...
Low freezing point washer fluid.
IMO-Energy bars, shovel, wool caps and blanket(s) in case.

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2001 e53 4.4i Sport, Nieman Marcus Edition. Stealth One.
2013 e70 3.5d Stacked, Custom