After many requests, I finally made a tutorial on how to tie a simple head scarf. It's really, really easy. I did this without looking in the mirror, so that should tell you how easy it is. Let's get started!
Start with a large, square scarf. I like my vintage silk scarves because they're soft and not bulky.
Fold one corner to the other to form a triangle.
Fold the corner down to about the middle, and then fold over again (but not all the way to the edge, because you want it to be a little thicker).
Put the scarf around your head with the ends in the front, making sure the wrong side of the scarf (the part where you can see the folds) is against your head.
Tie it in a loose knot at the front. I like to keep the whole scarf a little on the loose side (it will stay in place).
Tuck the ends behind/underneath the scarf.