A do-it-yourself neck pillow for airline flights

On long flights (especially international ones), airlines usually give you a pillow and blanket. The pillow is next to useless, since it won't stay in place where you want it to be. One of those wrap-around neck pillows can sometimes be handy, but if you don't have one, you can fashion one out of the airline blanket. Just put it around your neck like a scarf, then tie it around your neck with a big double knot. The knot serves as a pillow that stays snug against your neck. You can turn it in whatever direction that works and it will never fall off. (Hopefully, you can find another blanket to use as a blanket.)