By making peace with the body you have now will give you the body you want in your visualisation. If you live with a distorted self-image you are keeping yourself from truly enjoying life and being happy. If you look in the mirror of a morning and tell yourself "You're a fat fucking cow" or "You have fat thighs and a fat arse" then you'll go about your whole day not feeling good about yourself. Instead, think back to what others have said to you. "You're shoulders are amazing", "Super strong girl", "You're a sex kitten". See what others see in you. Smile and notice how good that feels. Take that feeling and hold it close to your heart always. Never say to yourself what you wouldn't say to anothers' face.