I keep the standard jumper cables, jack, extra clothes, thermal,boots, that tool that can cut a seat belt and punch out the windows,etc. But in a backpacks I have my survival gear. candles ( a lit candle can increase temp of car 10 degrees), matches, flint and striker,cotton balls dipped in Vaseline (tinder), first aid kit, 9 inch full tang knife, small knife sharpener,iodine for water purification,tarp, fishing hooka and line, duct tape, compass, leatherman multi tool,stainless steel water container and stainless steel container for holding candle or anything hot, coffee jar with toilet paper soaked in rubbing alcohol, paracord, extra water and granola bars, extra cash in small denominations, crank operated eton radio/flashlight,gloves, folding saw and hat. Yeah seems a lot, but it all fits into 1 backpack and I am ready for anything.