Additional winter car suppliers:

2 microfiber fleece blankets
2 1 gallon ziplock bags, (doubled so they don't spill), filled with kitty litter
4 sets of 2 hand and 2 toe warmers

Collapsible aluminum shovel
Collapsible scraper/brush combo tool
Warm hat and gloves

Spray lock de-icer in the glove box. Normally ice only forms on one side so 1 lock should open. I also keep an additional spray in my laptop bag.

Rain x and anti fog windows before any storm. It's much easier to remove snow and ice with the rain x on the windows. The windows won't fog with the rain x anti fog.