Apply a quarter-size amount of a thick anti-frizz serum to towel-dried hair to keep your strands smooth. Rub the serum over your hands, then run your fingers through your hair from roots to ends.
Blow-dry hair on high heat starting with a 3"-wide section in front. Use a round brush with holes in it so the heat can reach all your strands. Aim the dryer directly at the round brush, first from above and then from below.
Roll each section under onto a Velcro roller after blow-drying it (while it's still warm). As you dry the rest of your hair, this will prevent it from getting messy and blown around. Velcro rollers also add body and bounce.
Remove the rollers when all your hair is totally dry and has cooled. Finish by evenly misting your whole head with an aerosol hairspray from 10 inches away. This seals the hair shaft, so it stays smooth and frizz-free the entire day.