Blizzards happen. This one affecting much of the east is particularly bad, but they happen--and they'll happen again.
Most of the things people should do to prepare for one disaster are the same for any disaster: Stocking food, water, first aid supplies, battery powered lights and radios, and so on. When you're hit by a tornado, earthquake, snowstorm, or many other catastrophes, you might be on your own. Emergency services might not be able to get to you at all, or they might be overwhelmed.
Whenever an emergency comes, someone who thought it wouldn't happen to them has it happen to them. Don't wait until it's too late to be prepared. It's not silly. It's not overkill. It's what may keep you and your family alive.