flintknapping one of the first survival skills ever and could save your life in a crisis thats why I think more people should pick up this skill. You could make knives, axes, hide scrapers, dart points and arrow points.
Has anyone heard of flint knapping? I actually have picked up this skill. Its really fun. Just the concept of making a huge chunk of rock into a very useful peice of equiptment,Fire,hunting,spear,knife,etc. I found a cuple of great videos of the basics.