Cheat Days?
Who would you be cheating? I'm with Candy (sleevegirl) on this one. If there's something you want, fit it into your plan. But don't call it a "cheat."
And, just for the record, all carbs are not evil. Not everyone has the same reaction to carbs. I was low carb for the first year because I really couldn't fit much of anything else in. Now, I eat a variety of food. I haven't found anything that "triggers" me. The closest I come is that if I have a slice of bread, there'd better be a pillow in front of me, 'cause I'm going to sleep! So I tend to avoid bread. Find your happy place and stay there!