How to Get Nicer Teeth?

I want to be able to have whiter and overall nicer teeth but I don't want to use chemicals or anything to bleach teeth. How would I do this?

Suggestion:

Baking Soda. Look it up if you don't believe me.

You put a small bit on when you brush with your toothpaste. You don't put it on everytime though. once or twice a week.

Lemon juice also works.