I live in California, The Land of Hoodies. Recently the second worst thing that could happen to a hoodie (the first being lending it someone and losing it forever), the hood string came out!
I'm not sure where I learned this Life Hack, but I'm gonna share it because it's brilliant!
Feed the string through a LARGE paperclip, then run the paperclip through the seam for the string. Since the paperclip is bigger and a different texture, it slides easily and quickly for the quickest fix ever!