I've heard it said:
"A pistol is great to have so you can fight your way to a real gun".
I don't know if that's entirely accurate, but a good rifle in your can be real heart warming when things get extra ugly. With that in mind, do you carry a rifle or shotgun in your vehicle, in the event "ugly" finds you while you're away from home base?
I'll start - a DPMS .308, 6 loaded 19 rd. magazines, and 3 200 rd. battle packs of ammo in the trunk.