Car Kit

I just put together a car kit, which is something that should have been done a long time ago, but I just got around to.
Here's what's in it:

• Box with a lid
• Cash - $20 or as much as you think might be appropriate 
• Hand sanitizer
• Notepad, pens, pencils
• Book or magazines
• Jumper cables
• Feminine products
• Change of clothes (shorts, t-shirt, socks is fine)
• Plastic grocery bags
• Blanket or towels
• Basic first aid kit
• Toilet paper
• Sewing kit
• Ibuprofin
• Wet wipes
• Flashlight and batteries or crank flashlight
• Snacks (trail mix, granola)
• Bottled water

Everything you need is easy to attain, and all relatively cheap. I think the most expensive thing was the jumper cables, which were under $40. All of these things are really handy to have.
When we got to the airport after our trip, we got to our car, and a light had been left on, so the battery died. We couldn't start our car, and it was 11:00 at night. If we had the car kit, we would have been able to start our car with the help of someone else. Instead, we had to wait 20 minutes for a guy to come up to the 7th level of the parking structure and jump start our car for us. 
Moral: be prepared.