I had mine by my bathroom mirror with a photo of myself at the smaller size I wanted to be. When I was weighing almost 90kgs I started reading it and it wasn't true and it felt weird at first. By doing this I dropped the weight and changed my eating habits and exercise behaviours. I really do love exercising now and I eat healthily (most of the time).
Use my example and adapt it to suit what you want. Use present tense as if it has happened already and use powerful I AM statements to create what you want.
Read it out loud as you look in the mirror and act it out if that feels right for you. The mind learns through repetition so the more you read it the more your mind will go "oh she says this so often it must be true" and then the body will follow.
Certified Advanced Rapid Transformational Therapist
Member – International Institute for Complementary Therapists