You may have straight or curly hair. But the basic requirement to looking good is to keep your hair clean. Some people might need to wash it daily. Others can get away with a shampoo twice a week. It all depends on how frequently your scalp gets dirty. Make sure you use a good shampoo and conditioner. Curly hair is drier than straight hair. So you must make sure that your conditioner is a heavy one that will keep your curls moisturized.
If there is too much build up in your hair, then it will make your hair look dull and will make it very hard to style. After washing pat your hair dry with a towel and apply a thick leave in conditioner. Avoid rubbing your scalp with the towel as wet hair tends to break. It is best not to use harsh chemicals on your hair as they tend to damage the hair follicles. If you have put oil in your hair, then you must wash it off the next morning. Oily scalp get dirty easily.