Defense is your best way to fight damage. In other words, try to prevent damage in the first place.
Don't overwork your hair. Excessive brushing, combing and styling causes damage. So treat hair gently (especially when wet) and use a wide-toothed comb to work through tangles.
Condition regularly and thoroughly. The ingredients in Repair & Renew conditioners work to smooth the outer layers of the cuticle, lower friction and increase moisture content.
Don't take the heat. Hot appliances like hair dryers and other styling appliances can actually cause the water in the hair to boil, weakening the hair shaft. Keep a hair dryer 4-6 inches from hair, and keep it moving.