1. Brush and floss regularly: Brushing and flossing your teeth twice a day is the best way to prevent stains from forming on your teeth.

2. Limit staining foods and drinks: Certain foods and drinks like coffee, tea, red wine, and berries can stain your teeth. Limiting your intake of these foods and drinks can help prevent further staining.

3. Use whitening toothpaste: Using a whitening toothpaste can help remove surface stains on your teeth and make them appear whiter.

4. Try at-home whitening treatments: At-home whitening treatments like whitening strips and trays can help whiten your teeth. These products contain a bleaching agent that can remove deeper stains from your teeth. Be sure to follow the instructions carefully and consult with your dentist before using any at-home whitening product.

5. Get professional teeth whitening: If at-home treatments do not give you the desired results, you can consider getting professional teeth whitening at your dentist's office. This involves using stronger bleaching agents that can whiten your teeth in just one session.

6. Maintain good oral hygiene: Regular visits to your dentist for professional cleanings and check-ups are important to maintain good oral health and keep your teeth white. Your dentist can also provide you with personalized recommendations for maintaining the whiteness of your teeth.