Brush your tongue. Your tongue needs attention just like your teeth and gums do. Use your toothbrush and brush your tongue just like you brush your teeth. Not only is this good for your dental health, but it can help with any bad breath you may be experiencing, too.
Studies show that following up your healthy tooth brushing habit with a fluoride rinse can reduce your chance of cavities by as much as a third! That is a lot of potential cavities, so ask your dentist to recommend the most effective wash. Pick up a travel-size too and keep it handy for those times when you can't brush.
Drink soda and non-water beverages with a straw. That helps them to avoid contact with your teeth. That will help keep your teeth clean, but it will also keep them white. If you cannot use a straw, make sure you brush as soon as you can after drinking those things.