I got tired of looking around so I gave it some thought of what to be in the car.
Tools. I have a car that I no longer need to carry a tool kit to fix it.
I have the small razor knife so that I have something to cut.
If I am stopped on a campus, I have a good argument that this is not a weapon. Also, hard to see is a small crowbar to break a window if needed or prying something. Flashlight, paracord, small pocket knife (from a gimme at a trade show years ago, we used to have several) it has a small set of scissors on it. Rubber bands, hair ties, safety pins and paper clips.
Other things, Two Liters of water, a signal flare. I need to get some oil, just in case. And a set of Jumper cables or emergency starter kit. The Jumper Cables _will_ have the gauge that checks if the set up is right.