"Too much product is the number-one enemy of a good blowout," says Townsend. On wet hair (don't rub dry with a towel; it causes frizz), comb a nickel-size amount of your favorite heat-protection gel or styling cream through strands. "You can always use more product later, but you can't take any away," notes Townsend. Avoid greasy buildup — especially if you have bangs — by forgoing sprays and mousses near the hairline.
MC Recommends: Sally Hershberger Style Primer, $12.50; Matrix Biolage Bodifying Spray Gel, $16.50.