Has it really worked for you?
Most Helpful Girl
Baking soda and Peroxide are popular ways of doing (as you can see from other comments) but they both can cause gum damage, which you don't want.
Some toothpastes have whitening properties, have you tried those? the only thing about them is that you have to brush your teeth 3 times daily for a difference to be seen.
There's also the charcoal rub, its supposedly effective but it does Not taste good at all
Another one is getting strawberries and mushing them into a paste/gel/jam and rubbing it onto your teeth then rinsing thoroughly before brushing you teeth twice daily
The same can be done with orange peel before brushing
You can use ground peelu fibers like a powder toothpaste
Personally, I've tried the orange, charcoal and whitening toothpastes. But, I never stuck with them long enough to see a difference.