I thought I'd share a couple of tips with you =) I don't use whitening strips or anything like that, I mostly just use weird things I have in my kitchen... XD
I brush my teeth every morning with a gentle whitening toothpaste. Every second day, at night I'll mix salt and baking soda, get water on my toothbrush and dip it in the mixture. This will damage your teeth if you do it often, wich is why I only do it every second day, it have really made my teeth whiter. Another trick I use is to rub the inside of a bannana peel against my teeth in circular motions. This sounds really weird but I saw results In only two weeks!
I hope You enjoyed these quick, Little, weird tips=)