This. If I cook a meal with mostly veg and lean meat, I can't overeat. I'll feel full fairly quickly and, most importantly, not think about food 2 hours later.

But even with this kind of food, if I figure "sure, lemme have a sugary ice-cream", two hours later I'll be looking around the fridge and cupboards for some "quick bite".

Just don't buy this crap. I find it's much, much easier to have none at all than to hope to be "reasonable" and only eat a bit.