A brighter smile boosts confidence and indicates social status, so it is important to keep teeth clean and white. The document provides 10 tips for whitening teeth, including brushing twice daily, rinsing after smoking or drinking tea/coffee, using whitening products with peroxides, and whitening with a dental tray under a dentist's supervision for best results. Various whitening methods may be needed if teeth have a grey shade. Chewing xylitol gum and using berry pulp can also help whiten teeth naturally.