Posted 12/16/2016 10:42 AM (GMT -7)
There are a few good suggestions here. Making sure you have adequate medications is a big one so you don't have to run to the store in a snow storm. Of course if you take controlled substances, that may be impossible since you can't fill those ahead of time (depending on your location, some places have some leeway).
Having a cane, walker or other assistive device if you do have to go outside can save you from a nasty fall.
I'm a car guy and wouldn't recommend tire chains though. Everybody in snowy climates should have dedicated snow tires, or at the very least good quality, well-rated all season tires. Snow chains are difficult to install in most cases, especially since they're rarely used so people simply aren't used to putting them on. They also often only give you marginal improvement over your tires without them.
If you have significant physical impairments, I'd highly recommend having a friend or neighbor lined up to shovel a path for you, get your mail, groceries, pick up meds or other errands. I had to take advantage of this several times and it was a lifesaver!