I was listening to a fitness podcast and they were talking about "fake it until you make it".
The idea is that if you are say, 200lb woman and you want to be a 135lb woman, eat and act like they would to maintain 130lb rather than thinking of yourself as 200lb and acting like a 200lb person on a diet. This is supposed to put you in the mindset of "proper eating" rather than "dieting" and sets up all those good habits before you get to goal and so maintaining should be easier.
They were saying, that by default if you eat like a 135lb person, you must become one (or thereabouts).
So as an example, I am 5'6". If I was 200lb, my BMR would be 1666 calories, for my height. At 135lb I would need to eat 1383 calories per day as a BMR to maintain (plus exercise cals). So rather than trying to remove 500 calories from 1666 calories to loose weight, which could be quite tough, I should eat 1383 per day.
Has anyone tried this? It is an interesting idea.