I motivate me. I regularly have to give myself a good ole kick up the bum!
The compliments help. The thoughts of walking into a normal clothes shop and picking something up, knowing it will fit me (and if it doesn't, I won't be embarrassed to bring it back!) helps too. This site is a great help.
But mostly.. it's me. It's the same for everyone. If you don't motivate yourself, nothing will change.
xx