I think maybe you're asking the wrong question (or possibly of the wrong people?)
Some people struggle with it, and succeed through self discipline - so they can probably give you the answers you want.
Some of us just don't have the "food noise". I don't think about it. If I go to a restaurant I eat what I fancy that night, but if I eat heavy food or multiple courses, I won't be hungry the next day and might just drink tea and water. I'm not denying myself anything, it's just that my body feels full and doesn't want to eat. And I love food, interesting tastes and flavours and new dishes - I just don't want to eat except when I'm actively hungry.
Likewise, I don't usually snack and feel no desire to, so I'd just refuse the biscuit as being of no interest, rather than having to consciously avoid it.
If I feel like buying snacks at the supermarket, I do - and chances are, by the time I get home, I'll stick them in the cupboard and not want them, and then give them to a friend later in the week.
If you wanted a strategy, I think it's called "intuitive eating" - you get to really understand your body's cues and signals, so you don't misunderstand thirst or boredom or sadness/emptiness for hunger - so you only eat when you're genuinely in need of food, not for emotional or other non-sustenance related reasons. And for the same reasons, you stop when that cue has been satisfied, which might well be less than the whole plateful.