Soft drinks: It’s not just the sugar, the high acid content strips minerals from tooth enamel.
Fruit juices: Although some with a lower sugar content are not as bad for you, it is still a good idea to rinse your mouth after drinking one. And aim for ones that are calcium-fortified.
Over-Brushing: Can too much brushing really be a bad thing? Yes, if you brush too fast and too hard. Use a soft-bristle with gentle strokes on your teeth.