Eat less. Seriously, I lost 6 stone
Don't eat late and walk.
Atkins did me really well when I hit a level too, but I dunno about you but I cannot be arsed with diets where you can/can't eat shite.
My weight cam eoff quick enough. I didn't eat (I was sad) for a couple of weeks, then your stomach shrinks and you don't want to eat as much.