On my person always:
G19, spare magazine, S&W642, 1 speed strip, spyderco delica, surefire flashlight, cell phone.
In my vehicle always:
First aid kit, fire extinguisher, small tool kit, work gloves, jumper cables, surefire caddy with 6 batteries and spare bulb, GPS, AA batteries, rain jacket.
Situational in car kit:
Food, water, change of clothes, change of shoes, shotgun or rifle, ammo