Avoid coffee and red wine as much as possible. Both will quickly stain your teeth,Strawberries have a natural bleaching effect and are loaded with Vitamin C, so you simply can't lose. Rub the pulp over your teeth and then rinse, Brushing your teeth every 12 hours,Lemon peel massaged over the teeth is often used for whitening. Rinse thoroughly,Avoid smoking,floss at least once a day.thank you