1) Add some texture to hair by backcombing or ruffling vigorously with fingertips. If you have a texturising spray, all the better [I swear by the Oribe Dry Texturising Spray]
2) Section the top layer of hair with fingertips into a roughly inverted V by running fingers from the tops of ears to the crown of your head
3) Tie in a pony tail after finger-combing any really wild bits [but remenber that your goal isn't necessarily to get it super neat]
4) Pull the hair coming out the pony into a circle around the band, pull it into the shape you’d like and secure with a couple of kirby grips.
You're good to go!