Somebody once recommended pumpkin seeds as a snack to me. Not because they are especially healthy or something like that, but because they are really annoying to peel. Yes, I could eat them unpeeled, but the entire point of the idea is to make the snacking just a bit less rewarding. I tried it. Worked for maybe a week or so before I stopped. But it had a much more interesting long term effect: it got me used to unsalted nuts as viable snacks. Of course I immediately fell back into my old habits after the pumpkin seed experiment, but from then on I made sure to always buy a pack or two of unsalted nuts or seeds or dried fruits together with my other snacks. And at some point I managed to figure out the one rule that worked for me, and had the biggest impact long term: only buy new snacks once I've fully run out of old ones. And maan, that bag of wallnuts/peanuts/pumpkin seeds/dried apples could last for a long time. In turn I also started snacking on stuff that I didn't really consider a snack before. Like, I'm bored, and the only snack in my cupboard is a bag of wall nuts - so I'd make myself a cucumber salad instead (which is just cucumber and soy sauce. Maybe some olive oil if I'm feeling fancy) . I didn't really stop snacking. And the amount I am eating hasn't really gone down either. But what I'm eating has become a lot less fatty and sugary in general. It took me about five years of very slowly changing the ratio of sweet snacks to healthy snacks, and by now I basically never have more than one single pack of cookies, chips or chocolate at home (which is gone within a day, but it'll take about a week before I buy another one). At social events I find myself constantly eating whatever is on the table. But all in all, my weight is very slowly, but consistently, going down, and I am feeling better about myself in general.

Tldr: buy a bag of unpeeled pumpkin seeds, and force yourself to peel each one of them before eating it. See where the journey takes you.