Doug, I heard that AllState is reducing insurance premiums by 15% now since nobody's driving. It's not a ton, but it's something. Call your auto insurance and see if they can cut you a deal or lessen your coverage, as you mentioned.
A water bill is usually a place where you can cut costs too. Stretch out your laundry, wash dishes instead of using the dishwasher if you have one, and not to be gross, but there's no reason to shower every day unless you exercise/sweat excessively.
My cooking's definitely gotten very creative. The other day I mixed up sauteed canned sardines, ricotta, and cooked frozen peas, put it on grilled bread, and topped with dried dill. It looked disgusting but was actually delicious. There was a period of my life where I had a food budget of $1.39 a day (and a much longer period when it was more than that, but not much), and it's totally doable, if not probably the best diet for years at a time... Also, alcohol is expensive. If you drink, I'd never recommend giving it up right now, but find out what you drink slowest. I drink wine much slower than I drink liquor or beer. The liquor stores in Pennsylvania are closed and that'll teach you to ration your alcohol real fast