To avoid hair breakage it is good to always moisturize you hair from the root to the tip, and condition it when you wash it. It is a good thing to trim the dead edge at least once in every three months and avoid too much heat on your hair. For more information you can visit http://napturallycurly.com/2010/05/preventing-hair-breakage/.
When hair is extremely tangled, brush from the bottom up slowly and gently. Use moisturizing shampoo and conditioner. Use moisturizing products before blow drying hair, and blow dry on warm or cool, but not hot. Use low when hair is damp. Whenever straightening or styling hair, use protective spray.