No Snacks, no sweets, no seconds. Except on Days that start with S. Too simple for you? Simple is why it works. Look here for questions, introductions, support, success stories.
It doesn't have a great deal to do with behavioural control, but does offer:
"This study demonstrates the need for weight management programmes to recognise the different needs of different genders, ages, and social and cultural backgrounds. The diet that works best, is the one you want to do."