This Article does a good job of laying out what you shouldn’t do if you want to survive your winter travels, although he did do one big thing right.
The don’ts: don’t go wandering around in the snowy middle of nowhere without telling people where you’re going and checking in. Don’t go wandering around in the back-of-beyond without adequate communications gear (SW radio, emergency locater). Don’t go wandering around in winter without warm clothing, a sleeping bag, and extra food and water. And don’t go places you and whatever your vehicle traveling in can not handle.
The do’s: do stay with your vehicle. This probably saved him and his dog’s life. I’ve been reading these lost in the woods articles for a decade or so and when they find people with their vehicle they find them alive, when people decide to abandon their vehicle in the middle of winter rescuers tend to find their bodies.