You don’t have to be scratching out a manifesto on the walls of some underground bunker to understand the value of maintaining at least some rudimentary supplies for disaster scenarios. From floods and fire to civil unrest and rolling power blackouts, we live in a time where emergency preparedness should be a legitimate concern for everyone. But what should a survival kit contain? Whether you are piecing together your own kit or buying one off the shelf, any “bug-out bag” should account for the three pillars of survival: food, shelter, and water. Beyond that, items such as a first-aid kit, lighting, sanitation, fire-making supplies, and a signaling device will increase your chances of surviving in relative comfort and safety. Here's how to break down the basics.