To prevent bad breath

 You Brush—But Only Your Teeth

Neglect your tongue, and your breath may not be as fresh as you'd like.

Your tongue is covered with thousands of small hairlike projections called papillae, which can trap and harbor tiny scraps of food. So even if you brush and floss regularly, small remains from your meals can hang behind, collecting bacteria and emitting hydrogen sulfide vapors—aka bad breath.

Fix it: Mouthwashes may help, but the best way to remove bacteria, dead cells, and food debris from the crevices of your tongue is with an inexpensive tongue scraper. Brushing your tongue with a soft-bristled toothbrush works well too. Gently clean as far back as you can without gagging. Also, switch to a toothpaste that contains chlorine dioxide or tea tree oil, a powerful disinfectant with a pleasant, eucalyptus-like smell.