If the world were to end tomorrow, here are the things you would need to survive.
Canteen: Water is required for survival and a canteen allows you to safely store it.
Canned goods: These non-perishables can last for years to help you while you’re stranded.
Rope: There are many uses for rope such as tourniquets, riggings, repairs, etc.
Pocket Knife: A multi-tool has a screw driver, knife, tweezers and many other things; it would be extremely useful.
Flashlight: If you need to travel in the dark this will make sure you don’t run into anything nasty.
Lighter/Matches: These will make it easy to start a fire so you can cook foods, keep yourself warm and fend off animals from a camp.
Flint & Steel: When you run out of matches or lighter fluid you can use this instead.
Blankets: To keep you warm in the winter or at night so you don’t freeze.
Protection: Knife, Sword, Gun, etc.: These will allow you to hunt, protect yourself from other people and anything else hostile.
Medical Supplies: Things such as bandages, hydrogen peroxide, ibuprofen and aspirin are going to be important for when you have an injury.
Clothes: To keep you protected from the elements, and in winter they will keep you warm.
Backpack: You need some way to carry all of this equipment.