Start by choosing how long you want the top and section it off. Then, depending on how short you want to sides and back, use a trimmer or scissors to cut it to the desired length. Release the hair on top, combing it down to where it would usually sit. Take a sharp pair of scissors and carefully cut in a straight line around the head, including the fringe, making sure to keep it all the same length. If you want, you can add texture or take out excess bulk with thinning scissors.