The best advice is to avoid the previously "customary" post-diet-fail tailspin and saying, well, all is lost and having a second piece (that used to be my custom too). I tried the "Carbohydrate Addict's Diet" with one freer meal per day in a 1-hr window, which didn't work for me (it was like letting a smoker have 1 cigarette per day - it just kept cravings go), but it did make me appreciate that if I only eat one higher-carb meal but get immediately back to Atkins Induction eating, it has no lasting effect. If you let your trigger foods trigger you to eating more, and more again, all can become lost. Yes the scale goes up the next day, but it is mostly water that comes back off quickly if you keep to under 20g carbs/day.