Well, I sorta started out with a goal weight of 140lbs thinking that it would be impossible, but what the hey, I'll aim for that number.
I really started by thinking, "if I can lose only 10lbs that would be great" then I progressed on to "if I can just get down a size that would be fab" then I started to set mini goals of significant numbers for me, like 10lbs down, 25lbs down, the weight I was at age 12 (217), the weight I got down to at age 13 (192) and then I was in virgin territory and just kept on goin' and I still am. I also still have mini goals, the next one I want to complete is 1lb away and it is a 115lb loss.
I must admit that I am really motivated by getting to change my chickie avatar!!