I'm doing the slow-carb thing, and it really helps to know that on Saturday I'm going to eat whatever I want and however much of it that I want. What's interesting is what I'm finding from it:
1) My recent cheat day started out with half a cupcake, a donut, a croissant, and a mocha latte. Lunch was an In-n-Out double-double with fries and a diet. But after being on a restricted calorie plan the other 6 days, I was so full that dinner was a glass of red. I probably ate about the same calories eating whatever I wanted as I do the other days of the week when I'm very careful, and believe me, before I started this crazy diet, I would have put away that burger and gone back for more.
2) On the "other 6 days" I mentioned above, I get hungry and struggle to stay full. BUT! I don't crave the crap I eat on Saturdays, like burgers, fries, chips, donuts, chocolate.
I guess in response to the original post: I don't keep "panic" foods around because I don't panic - I actually keep a list of things I want to eat on my cheat day, because when I know I'm going to eat it soon, I can just look forward to it.