Finally, definitive step-by-step instructions on DIY-ing a kerchief (like model Kim Riekenberg's, below).
Step 1: Commence Folding
Fold a large square scarf in half to make a triangle; fold the long edge over again by one to two inches.
Step 2: Cover Your Head
Place the folded edge of the scarf over half your forehead and the body of the scarf over your head.