For Medium-Length Hair
Prep dry hair with setting spray to ensure that the final look lasts (try John Frieda Root Awakening Strength Restoring Hair Spray, $6.50, drugstore.com).
To do: Part your hair down the middle in back, then twist the hair on each side of the part tightly toward your nape. Hold each twist in place with an elastic at the base of your neck. Hide both elastics with a strand of hair from each ponytail, securing the wrapped strands with a bobby pin (this will also help keep the twists from unfurling).