Something that worked for me was the eat the same thing every day... for two months. That way I only had to count calories once, and knew exactly what to buy and could prepare it mindlessly. Once I firmly decided: *this* is what I eat, it was so much easier to stick to it. In fact I'm thinking of going back to it.
5'0" female, 45 years old. Started Primal October 31, 2011, at a skinny fat 111.5 lbs. Low weight: 99.5 lb on a fast. Gained back to 115(!) on SAD chocolate, potato chips, and stress. Currently 111.