Hand sanitizer is a fast way to unlock a frozen car door.
Use a shoe organizer to keep important items nearby.
Or go ~crazy~ and make a whole series of organizers.
A cereal container makes for a portable (and close-able) trash can.
Invest in a swivel tray for all your fine-dining needs.
Dryer sheets help keep the air/you smelling fresh.
A hanging tennis ball will help prevent bumping into the garage wall.
And half a pool noodle will protect the side of your car.
If you're driving an unfamiliar vehicle, the little arrow on the gas gauge usually points to the side where the tank is located.
Paint or use reflective tape inside your car door so it's more noticeable to passing traffic.
Rig up a screwdriver-key to make it look like you've stolen your own car.
Make a trash bag holder from an empty canister.
And a coffee cup can become a tissue holder.
Harness the power of the sun to help defrost your windshield.
Use a shower caddy as a stuff-holder-slash-seat-divider.
Toothpaste helps get rid of scuffs.
Make a carseat hammock that your dog won't fall out of.
Use an empty gum container to keep loose change not so loose.
Make a go-anywhere cup holder from a tape roll.
Give your car a $100 brand-new paint job.
Maybe leave the important stuff to the professionals?