There is a new "Hidden Sock" hack that is making people, women in particular, go nuts.  Take those regular tube socks and turn them into those no-show ankle socks without buying new ones.

You start by putting on the tube sock, from the top where the elastic is, peel it as though you were taking it off.  Now it's somewhat inside out.  Don't take it all the way off though.  When it gets down to you toes, wrap the extra under your foot and hook it behind your heel.

It sounds hard but it's quite easy.  The video shows how simple and effective it is.