Celebrity hairstylist Marc Mena says that washing and blow drying your hair the night before, then sleeping with it up in a top knot is the perfect solution for busy, working women. Mena says that the topknot prevents hair from excessive bending and prolongs the life of a blow out. Mena also suggests securing the knot with bobby pins or a scrunchie as opposed to an elastic band, which could leave strange creases in your hair.