If you are looking for something to munch on in your kitchen and you see bananas, apples, grapes, strawberries, hummus, salad mixes, carrots, almonds, hard boiled eggs, celery, high fiber cereal, yogurt, and Oreos, which would you choose? Sure, you may say Oreos today, and maybe tomorrow too, but wouldn't you get sick of eating Oreos after a while?
My point is this: Keep a variety of healthy foods available, but just one kind of junk food (for those times when you need something sweet and unhealthy). Eating the same kind of cookies every single day will get boring, and you'll be more likely to dig into the wide variety of healthy goods rather than those same old cookies, again.
It may not work for everyone, but try it out and let me know if it works for you
in the comments section below.