Well, I don't know what program you're on or what foods you're allowed, but I'm finding it helps to allow myself little 'indulgences' - only really, they're not, because I count them in my calories and make sure I come in under. So I have a glass of Coke, or a fun-size chocolate bar, and it's all on-plan.
It really depends what you're looking for - if you're trying to permanently cut out junk, then of course that isn't suitable, but if you're trying for moderation, and don't have a tendency to binge, it might be worth keeping some fun-size chocolate bars, or small packets of snacks, so when you want a treat you can check your calories and decide whether you can 'afford' it - and if you can, do so with no hard feelings. I find that knowing there are treats in my future also makes it easier to deny myself now - if I feel grumpy because I can't have a certain thing because I'm at my calorie limit, I tell myself I can have it tomorrow if I spend my calories carefully. (Of course, that doesn't work if I want an entire chocolate cake, but so far my desires have been reasonable.

)
300ml of Coke, an individually wrapped cake bar, three mini Cadbury's creme eggs, a packet of Frazzles, a fun-size Flake bar - all under 150 calories, and meet my desire for snacks.