How do you prepare a car that sits 4 inches off the ground with nothing but plastic around the bottom? If I could get a new reliable Toyota that go 35- 40mpg per gallon with metal bumpers I would but you can't.
Have the tow guy do it, they can usually get under the tires and lift it as opposed to a strap or cable ripping it up. I have a cell phone, water, blanket, insurance with road side assistance and towing. I watch the weather and don't go places when it gets bad. Im prepared.
I am so prepared I don't have to rely on strangers passing by to pull me out.
Adding good recovery points would be a place to start. Lots of Subaru's around here do the rally type parts that are painted red or whatever.
Next I would suggest a core tool and an MV50 air compressor. Airing down the tires helps, even in a car. That has gotten me out of more bad weather issues when riding with friends than anything.
A set of tire chains/cables that can be put on with the vehicle not moving. I like the V or Diamond style Rud products.
A shovel, try to find one that can fit under as much of the vehicle as practical. I've made a few other the years for friends by cutting/chopping off the shelf units.
Heck. A little ATV winch setup on a bridle with some battery jumper cables isn't THAT crazy these days.
I agree with not going out on the roads when you aren't comfortable.
Personally, I don't like waiting/planning on a tow truck to come help me, especially on days where there are going likely be dozens of other needs for that truck ( and some of those potentially a lot more critical with people hurt or trapped in vehicles ). I like being self-sufficient when at all practical.
A tow truck, especially if you have gone off the road in the snow, is not going to pull up to your vehicle and use his lift. He is going to run a winch line out to you while he stays high and dry on the pavement. He is going to hook on with a strap, chain, or hook to whatever he can find. If it doesn't have a recovery point, he is going to take a big steel hook and grab the biggest part of the suspension or frame he can. Then he is going to yard your vehicle back up onto the road through that 2 feet of snow and ice. When it gets up to the road THEN he will put it on the lift, or the deck, and take it to where you want if you don't want to drive it.