Hair is most fragile when it is wet so avoid brushing or combing when it’s wet, or else it will cause breakage. Wait until your hair is almost completely dry before brushing it.
Use brushes/combs with widely spaced bristles/teeth and smooth tips. Sharp tooth combs can damage your hair, cause split ends, and scratch your scalp.
To keep your brushes and combs clean, wash them weekly using soap or shampoo.
Comb your hair to remove any tangles before brushing it.
Begin by combing your hair gently at the ends to get any tangles out and work your way up to the base of your hair.
Always brush/comb with a downwards stroke.
Avoid using plastic brushes/combs which create static electricity
Article source via http://www.haircareguide.com/tips.htm