I would suggest reading up on http://www.sf72.org/home if you haven't already.
One piece of advice is that if you collect portable camping gear, you'll find yourself decently prepared, since many of the items you need for camping also assume that you don't have regular infrastructure. Camping food/water also have 5+ year shelf life, so you can go camping and use up your old supply, as well as get practice using all your gear. No point waiting 20+ years to find out you have no idea how to use it.
So... between a month of food/water, a tent, sleeping bags, portable lanterns, wood/gasoline stoves, portable cookware, water filtration kits, solar power stations, hand-crank radio/light/chargers, steel-bottom/tip shoes, kevlar gloves, household tools (hammer, nails, wrenches, etc), outdoor tools (shovel, hand-operated chainsaw, etc), real first aid kits, etc, you find yourself decently prepared.
An added luxury would be a generator... Though costly, that would help keep your fridge alive, and there's usually a week+ worth of food in there, and you don't need your generator running 24-7 to prevent the contents from spoiling. Having enough fuel (or siphon from your car), extension cables, and a safe place to safely deploy it without concentrating CO or attracting too much attention might be a challenge, though. In a pinch, you can do this without a generator by using your running car and a 120V inverter, but that means leaving your car on, and again, we run into the same issues mentioned above.
If you're concerned about personal mobility, it's worth noting that you can buy solid (but heavy) mountain bike tires that cannot have flats, and it's something I've considered, but have not acted on yet.
All in all, I hope we all can get a bit more prepared and increase our chances at making it through these challenging events...