Do you constantly style your hair with a curling iron

flat-iron, or blow dryer? If so, then you can use products on your hair that will actually strengthen the hair with the heat instead of damage it. So don't throw away your styling tools yet, just make sure to invest in some good heat activated styling creams. Lower the temperature of your styling tools down a notch or two and make sure you don't leave heat on one are of your hair for an extended amount of time. Even if your flat-iron or curling iron say you can use while your hair is wet, make sure you blow dry your hair, on low heat, until your hair is just slightly damp. Avoid using any hot iron on sopping wet hair.
For more info: How Long Should I Wait to Bleach My Hair Again