How do you whiten your teeth at home?

I need different ideas. I already use baking soda but I don't see the change. help.
--------------------
What you can do is go to your dentist and get a custom made bleaching tray it's better than the ones already in stores because this one will fit perfect in your mouth and whiten all teeth. The dentist will give you bleach with it and after you've used up all the bleach he gives you, you can always go to walmart, cvs, Walgreen's and get bleach.
Source