This survival kit should consist of the things that could help you survive the cold and hunger when in worst case scenario you stuck there for days. Things like bottled of water, easy to prepare foods, blanket, flashlights, matches, batteries, charger or any communication device to tell your family about the situation that you are into. These are just some of the things that you have to consider putting in your survival kit.
If for some reason you have to leave the car, perhaps to keep from getting hypothermia, or decide to go for help don't forget to b. If you are lucky enough to bring with you the disaster gear kit that you have. If you believed that you are in the middle of nowhere, look for a sturdy tree that serve as a shelter for you and the person who's with you at the moment. You can burrow under the lowest branches that you can find, because snow very seldom penetrates the thick pine boughs.If there are no such trees available, you might try digging a snow cave using the things available in your survival gear kit.
Snow acts like an insulator once the sides are packed, but it can also make you wet, and moisture is your biggest enemy in the cold. No matter which sort of cover you have available, you would make a hole that is at least three feet wider and one foot longer than the tallest person. Pull the snow to that point and pack the sides. It takes a lot of energy to build a shelter in the snow and the heat produced by your body doesn't last long after you have started to sweat.
You will live longer doing without food than you will without water, but you have to be careful about getting enough heat to melt the snow. If you can't make a fire or don't have a heat source, you can eat snow. You can find more about this in this survival training [http://www.squidoo.com/value-of-preparing-all-the-important-emergency-kits] website.