We all spend a lot of time in our cars, we need to make sure we are prepared for whatever may come our way or even someone else's way. It is a good idea to have a car 72 hr. kit in your vehicle. You will likely be surprised how often you end up using it, not just for yourself, but other motorists in need. Some things most often used are gloves, shovel, axe and portable jump starter. It's amazing how many people get stuck in the winter or have dead batteries. If you choose to carry a portable jump starter, be sure to take it out occasionally and charge it up. Just because you have it, it does no good if you don't maintain it and make sure it is good to go when you need it. You can find several pre-assembled car kits out there that will work in a pinch and are a great starting point, but putting your own together, so that you know for sure you have the things you will need. You can find checklists that can get you started here , here , ...