I suggest you also check the air in your spare tire and make sure you have a functional car jack. A couple of road flares are handy as well as a reflector vest and a flash light. Also check your car's five vital fluids: engine oil, transmission oil, coolant, power steering oil and windshield washer fluid. I imagine everyone has a shovel and bag of salt ready for winter in case you get stuck. And, if you want to be prepared for the unforeseen accident, put a disposable camera in your glove box. Of course, everyone will have their cell phone ready and charged. Nothing like being ready.

Take it from a seasoned traveler.