With the winter season upon us, it is a good idea to keep certain items in your car. A snow shovel (to dig your car out); jumper cables (in case the cold zaps the battery); blankets, spare jackets, some food and water (in case you are stranded in your car); and a flashlight are all important items to have in case of car problems.
You also want to dress appropriately. Rather than one big jacket, consider two or three lighter jackets that you can layer. This will keep you warmer and you can easily add or subtract a layer if you get too warm or find yourself getting cold.
Wool socks are a good way to keep your feet warm and a pair of good boots that will keep your feet dry are also a good idea.