1. Prep Your Canvas: Wash and condition a shampoo create for curly hair, such as Herbal Essences Totally Twisted Shampoo and Conditioner. While you are drying your hair, start heating up a curling iron to full capacity. A curling iron with the clamp removed (just use a screwdriver!) will work best, but you can also just use a regular iron and ignore the clamp.
2. Get Twisty: Clip up the top section of your hair, leaving down the bottom quarter. Take a 2-inch section of hair and spray it with setting spray such as Fekkai Coiff Oceanique Tousled Wave Spray and then twist the length of it. Note: Twisting is key. This method will give your wave a casual, imperfect feel.
3. Curl a Section: Grasping the ends of the twist, wrap the hair section around the iron, leaving the last inch of the ends uncurled for an undone, beachy effect. (Remember, don't use the clamp!) Proceed in 2-inch sections across the entire head, taking down more hair from the clip as you go.
4. Shake It Like a Polaroid Picture: Finger-comb and shake out your hair so that each twisted/curled section relaxes into looser waves. Spray a bit of dry shampoo to matte out the texture a bit and you're done.