Once a month indulge in a hydrating hair mask. A nourishing treatment rich in botanical oils, such as almond and sunflower, will penetrate deeply into the hair shaft, bringing softness and glossy color to even the most straw-like locks, says Dr. Fusco. She also recommends sleeping with a humidifier in your bedroom every night, especially when you start cranking up the heat. "It keeps your hair from drying out."
(Clear Scalp & Hair Beauty Therapy 7 Day Intensive Treatment, $13/7 tubes; target.com.)Read MoreLess