What if you played a video game with you as the main character, and repeatedly acted out the behaviors you would choose, but which get repeatedly interrupted by negative patterns? What if situations are programmed–and I suspect 10-15 would suffice for most of the population–where you are offered, say, something that is not on your diet, and you say “No, Thank you.”
Would this work? Might be worth a try. In the negative sense, video games program us for violence, but why couldn’t we invert this and create realistic simulations of DESIRED behaviors?