Continue to provide warmth until EMTs, doctors or other qualified medical aid arrives. Watch for signs of shock. You can buy a survival kit or you can make your own. It doesn't matter how much money you spend or how many items you include in your survival kit. A survival kit won't help you if you left it back in camp.
Different people have different needs.
Some survival kits will have many more items than these listed above. For example, you may want to carry extra clothing in your kit. But all survival kits for hunters should include at least these basic necessities. Think of your survival kit as an emergency kit. If you are alone, lost or in a survival situation, fire is really man's best friend.