First make a fire if you're surrounding is cold. Use the MRES for food and the water for hygiene and hydration. If you can't see much use your flashlight to see your surroundings. Once you have slept and survived the first day you should seek help,and once you have found help, you should light a flare or shoot a flare into the sky. If help doesn't come just wait for as long as it takes. If you are stuck, use your crowbar or axe to cut away or pull out debris. Be very careful where you strike. If there is more debris on top it could collapse.