I bought a portable battery pack at the auto parts store, so that I don't need another car for a jump. If it's a jump that you need (because your battery is run down from attempts to start) you might consider getting one of these. If the fuel line is frozen, warmth is the answer... unfortunately, the regular cold-engine solutions do not apply for a fuel line. An electric dipstick won't defrost the right area, and a coolant warmer (a thing you splice into the hose going to your radiator) would be too much of a pain to install in this kind of weather. It wouldn't help, anyway. Do you have a friend with a heated garage?