Make sure to clean out your brushes and combs, and wash them periodically. A good rule of thumb is to clean them with soap and water around once a week. This will minimize the amount of build up that you will incur on your hair follicles and you will have healthier hair.
When you are in the shower and washing your hair, make sure you turn your hot water down, whenever you are doing your washing and conditioning. Hot water can dry out and irritate your scalp and this can cause flaking and dandruff that is unattractive and also, hard to get rid of.