You're Beautiful Challenge
I try to do this every time I say something negative about myself.
What you do is, for every negative thing you say about yourself, you have to say three positive things about yourself. I don't care what you say, it just has to be something good about you.
For example if you said: Egh, I'm so fat.
You would have to then say: I love my eyes, they're a brilliant shade of blue. I've been on honor roll for the whole year so far. I have great friends who would do anything for me.
By saying this, even though you said something you don't like about yourself, you still have plenty of things that are great about you. I've found that it really boosts my self esteem.
So, the next time you say something bad about yourself, try this.