Start by perfecting your oral care routine. Clean your teeth thoroughly twice a day, using a breath-freshening toothpaste like Closeup. Daily flossing helps remove plaque and food scraps that can release odors. Use a tongue scraper once a day to reduce buildup, and rinse daily with a cleansing mouthwash to reach areas a toothbrush can't. Finally, visit your dentist regularly to prevent tooth decay.