Use the Cool Shot Button
Don't ignore the existence of the cool shot button on your blow dryer. Using it is key for achieving the ultimate shiny finish. End your blowout with a 10-second blast of cool air all over your hair to seal the cuticle, bring out the shine, and minimize frizz.
Pro tip: When pressing the cool shot button, pull your hair away from the face and shake it side to side to ensure your whole head gets exposed to the cool air before letting it fall back into place.