Pump up the volume with this easy how-to for a full-body blowout. Start with towel-dried hair. Use your fingers and a blow-dryer to remove extra water from strands. Divide hair into three sections and clip each. Starting with a section of hair, apply a body-building mousse from the root to the end. Lift up the section with a round brush, pulling the hair in the opposite direction from how it will lay. Spray roots with a root booster. Blow-dry underneath the section to create lift at the root. Then blow-dry the section from above with the nozzle facing down, drying from the root to the end. Repeat until all the hair outside of the clip is dried. Repeat the same steps on the remaining sections. Set the look with hair spray.