what is the best way to avoid DANDRUF?

Try different kinds of shampoo that suits you, and use it everyday until you get rid of it ^_^ and oh yea, wash it out completely no shampoo left overs on your head. This works for me.

All i can suggest is that, you must take a bath everyday, and be sure to shampoo your hair thoroughly. Remember, do not scratch your scalp. Scratching will only worsen your dandruff. It is important to just massage your scalp gently, avoid irritating formula, use adequate amount of shampoo, and try to use an effective moisturizer. If all else fail, try to seek your physician. I know certain disease with symptoms like this. For example, psoriasis.

The best way to avoid dandruffs is to wash your hair everyday or even twice everyday. I had the same problem, Now I no longer have to deal with dandruffs cause I wash hair as often as I can. They don't have time to build up in my hair.