Mariemeeha

It is important that you get rid of your toothbrush about every two to three months.

Eventually, the bristles on a toothbrush grow weak from over-useage.

Do you tend to grind your teeth? Do your best to get rid of this habit.
Avoid eating hard foods, chew some gum and relax as much as you can. If you grind your teeth at night, it is best to wear a mouth guard until this bad habit goes away.

As was stated earlier, some people think that whitening toothpaste is the only type of cleansing their teeth need.
You should mix in a mouthwash that attacks bacteria if you are going to use whitening toothpaste.