Good Article: The 7 core areas of preparedness (Food, Water, Heat, Light, Sanitation, Medical, Safety) and The Rule of 3 - what this means is have 1 main & 2 backup methods of doing whatever needs to be done (a backup to your backup). Cooking, heating, lighting, and communications are all aspects that need backups of backups in case the primary method(s) are incapacitated.
Store charcoal in 5 gallon buckets. 1 Bag of Charcoal Briquettes will make it possible for you to cook 1 Meal a Day for a whole month. It's a great storage item to have on hand. Don't forget a couple bottles of starter fluid or a briquette chimney.