For me the biggest problem so far has been recognizing my fullness, so I just don't eat enough. This causes me to be hungry way too often. I'm working on it, though. I read that if you've been starving yourself your body often takes awhile to adjust and recognize fullness.
Good luck figuring it out- it is hard to pass up food but just think, if you don't want it why should you really eat it? Even if you've paid for it, is it really worth it to be sick with yourself?
Anyway, my fear is that I'm going to gain weight from this- it seems like such common sense just to eat when you're body tells you to when you are hungry, but I'm so scared that I won't be able to fit into my clothes!