Packing a winter emergency kit for your automobile is the single most important thing you can do for your car and for your personal safety. Having a box full of winter supplies in your trunk can make all the difference when something goes wrong while traveling on a cold winter day.
Here’s a quick list of items you should include in that box: a flashlight, road flares, a first-aid kit, a few blankets, a change of warm clothes for the driver, a few extra pairs of gloves, a radio, a charged cellphone for 911 calls, a bag of sand (for traction), an extra ice scraper and some high-energy snacks (like nuts or jerky).
My family keeps a pair of large Rubbermaid containers in the garage through the spring, summer and fall. The containers always carry these items, and we put those containers in our cars during the winter months after checking them over at the start of the season.