Newscasters are warning residents (30 million people!) in the path of winter storm "Nemo" (February 8-9, 2013) to prepare to be on their own for 72 hours in the face of up to 2 feet of snow.
A 72-hour kit is an essential part of basic preparedness. It is not too difficult to assemble with stuff you already have around the house. Use This List to plan your kit.