If you had to run into the woods with 3 items and never come back, what would they be?
#1 LIFETIME SUPPLY OF FOOD
#2 LIFETIME SUPPLY OF WATER
#3 LIBRARY OF CONGRESS
Just kidding. Here are the real top three survival items:
#1 TRACKER KNIFE
It acts as a great survival knife. Its design makes it very versatile for survival.
#2 FRESNEL LENS (magnifying lens)
A lighter can start hundreds of fires. A fire starter can start thousands of fires, but a fresnel lens can start fires indefinitely. It can't light fires at night or when it's cloudy, so for that reason, I don't recommend it for cloudy and dark places. However, I was thinking when 10 years has passed and your fire starter is no longer working, you will be wishing you packed a fresnel lens instead. If you get a fresnel lens that is big enough, assuming you can carry it with you, you can also cook food with it without leaving a smoke trail, melt and shape metals, and warm rocks to keep you warm at night--all great advantages of a fresnel lens over a regular fire starting item. Magnifying glasses and solar fire starters are nice too, but I think they are easier to break.
#3 GI CANTEEN KIT
A canteen kit gives you the ability to purify water and cook food. It's a nice combination of a water bottle, pot, and stove.
OTHER #3? MILITARY SLEEP SYSTEM
If you are going to be in a cold location, you might want to substitute a military sleep system or a really nice sleeping bag/bivvy to keep you warm and dry in exchange for the canteen kit. So if you opt to go with the sleep system instead of a canteen kit, you'll just need to find clean water or set up a filter or risk it, and cook your food by grilling or wrapping it in leaves, etc. However, I still think the better choice is the canteen kit and just hope to get a warm hide from an animal as soon as possible.