In the shower, go easy on the shampoo-the more natural oils left in your hair the better.
Steer clear of vigorously towel-drying and instead, blot hair so your bathroom floor doesn't end up covered in water.
Then cocktail equal parts gel and leave-in conditioner and coat damp hair in the mixture. Carefully and lightly scrunch hair (stopping a few inches below the root, so you get the top to lie flat). Air-dry, and keep your hands off since touching your hair creates frizz.