I'm pretty sure they no longer exist, but I remember doing really well on a Tesco diet. It would give me a shopping list and meal plan based on my preferences. I would just print out the meal plan and stick to it. It was varied every day through out the week. It catered to meal prepping and taking lunch to work. Everything was portioned out. It just took away the decisions and impulsivity I struggled with, and it worked really well for me. I only stopped because my ex complained about it costing money. Is there anything like this that still exists, and does any one else remember doing it? This was around 2009 I would guess