Try to remember to drink water every time you get thirsty instead of reaching for a soda. The more often you choose water over soda, the more often you are deciding to protect your enamel instead of wear it down. This also applies to other sugary beverages like sweetened teas and fruit juices.
Replace your toothbrush every three months. Even if you are extremely dedicated to cleaning your toothbrush properly, it's best to safe and not play chances with bacteria. Plus, bristles wear down after months of usage, so they don't clean as well. This goes whether you have an old-fashioned tooth brush or an automatic brush with cleaning heads.
Brushing your teeth twice a day is a great way to keep oral problems at bay. The first time to brush is in the morning, cleaning up everything, which has dried up in your mouth overnight. The next time would be after meals, and then just before bed as well.