Home teeth whitening?

I've never had a cavity, I brush my teeth twice a day, but my teeth are still not as bright or white as I'd like them to be. I don't want to have to go out and get whitening strips or what have you, so are there any "home" tricks that people have tried and actually work? I've heard of stuff like strawberries and baking powder, but never found any real directions. Thanks! <3
--------------------
I've used baking soda and a drop (low percentage concentration) of hydrogen peroxide.
Source