I also think about what ‘function’ a food item is serving within a meal, especially if it’s something I’m going cold-turkey with because I can’t moderate it - so for example, I realised if I was having a sandwich without crisps, what I actually missed from that meal was something of a different texture to contrast with the sandwich, rather than it being the crisps themselves, so now I add some cherry tomatoes to my plate.
While they can’t compete with Walkers cheese and onion, they make the meal feel more complete for me, as I’ve got some textural variation from the sandwich.
Along the texture theme, I realised a lot of my preferred snacks were crunchy, so I keep the large Snack a Jacks in, as they’re about 50 cals each, and because they’re quite dry they take a while to eat, so the max I ever have at once is about 3, which is less calorifically damaging than 3 bags of crisps would be.
Also if I feel really ‘snacky’, especially in an afternoon, I make myself a cup of tea and decide I’ll have a snack after I’ve had my tea, and more often than not the urge has gone off my by the time I’ve drunk it.