I keep nothing BUT the owners manual in my Jeep. Not only the glove box, but the Jeep. Somebody breaks into my vehicle, they are gonna be mad at the wasted effort. Pop open the glove box; Owners Manual. That's it. No do-dads, charging cables, spare napkins, old receipts, sun glasses, yada-yada. Nothing that has my name or address on it (also removed the radio card with VIN number). Door pockets ? Empty. Center console ? The occasional leftover water bottle. Center console storage ? Garage parking card for work and a tire gauge. Rear cargo area ? One bottle of oil in the net pocket, other side has shop rags and a funnel. Oh, and the rubber Jeep cargo mat. Underneath the cargo floor, tool bag, spare tire, first aid kit, two more bottles of oil. All hidden from view.
Yes, I use charging cables and the like, but I take them inside every day. I live in a nice neighborhood, no vehicle break ins, but if they decide to hit my vehicle, they will walk away disappointed. I drive an all black Latitude with very dark tinted windows so it's hard to see inside during the day, at night it's almost impossible even with a flashlight.
My buddy's Tacoma looks like a well worn junk yard inside. I once dropped a pen between the passenger seat and console, when we parked I reached under the seat to grab it. I pulled out 4-5 fossilized McDonald's French fries, couple packets of ketchup, a freaking drinking straw, empty water bottle, pair of sunglasses and a AAA battery before I got my pen !!
He said, "I kinda understand now why you never eat in your car, I never knew those fries were there.". Yep, I never, ever eat in my car. When I do buy fast food, I put it in the back on the rubber mat until I get home or to where ever I want to eat.