Just look around and look at what you buy on a regular basis. Lots of soap/shower stuff. Laundry detergent. Clothes, especially underwear. If you work on your cars, lots of motor oil and other chemicals. Light bulbs, of course. Toilet paper, paper towels. Things that you would really want to have, should the supply lines get cut. I went even further and bought cars and replacement water heaters. The list is endless...
Here: