What do keep in your vehicle and where?

[SDGuy]

car came with a cheerio spare tire with jack and lugnut wrench
Going from memory, I've added:
In the trunk:
- first aid kit
- valve tool & cores
- valve caps
- work gloves
- rope
- screwdrivers, socket set, pliers
- emergency rations and Life Straw filter
- jumpstarter/air compressor
- electrical tape
- jacket and spare set of clothes & underwear, shoes

In the passenger compartment:
- travel kleenex pack
- a few folded up paper towels
- garage door opener (with a spare battery)
- dynamo-powered flashlight
- maps covering the local and nearby areas (San Diego/Orange/Los Angeles Counties)
- owner's manual for the car
- small clipboard with pad of paper
- checklist on what to do in case of accident
- 2 to 3 writing implements
- film canister about halfway filled with quarters (leftover from when parking meters required them)
- small bottle of hand sanitizer
- ice scraper
- Element fire extinguisher
- Tide to Go Pen
- Trident mint gum (foil blister pack)
- collapsible umbrella

Thinking a bit, I should add a P-38 can opener as well, and a few utensils.