What are the top 5 most important items for a car winter survival kit?

Emergency Water
Emergency Food
AutoBrick Emergency Kit - WaterBrick | Building Hope...Saving Lives!
Survival Blanket
NAR Survival Blanket
Battery charger/tire inflater/phone recharger
Example: NEW Stanley J5c09 Jumpit Jump Starter

Bonus: When broken down awaiting rescue, know to only use vehicle heater on for 10 minutes, turn it off for 50, repeat