The best way to keep and maintain a healthy smile is regular brushing and flossing in the morning and at night time before bed. It is important to remember to clean your teeth before you sleep since the protective salivary glands reduce during sleep, otherwise we would drool all night, and the complex protective nature of saliva for your teeth are reduced with a reduced flow rate. Therefore bacteria sitting in a near stagnant pool feeding off the sugar or disaccharides from you diet ferment into a caries process to decay your teeth. Brush at a 45 degree angle to the tooth and gum, wiggle and then flick your toothbrush away from the gum and repeat for each section of teeth. Never scrub back and forth, as this causes toothbrush abrasion and wears away the neck of your tooth that can cause sensitivity.