Bright miners-style headlight so I can work with both hands.
Jumper cables.
triangular reflectors.
20 minute road flares
spare windshield wipers (they always fail when you need them most).
Roll of paper towels.
fix-a-flat.
3M florescent safety vest with reflective tape.
Foaming glass cleaner.
First aid kit.
Large HD trash bag(s).
screwdrivers, metric open-ends, pliers
Real duct-tape (UL-181B)
Piece of B or E guitar string to clear clogged washer nozzle.
Victorinox Multi-tool.
Eye drops to get the red out.
Hand degreaser.
Breaker bar for the lug-nuts.
Celery salt for the polish sausage at Costcos!