Nothing is off my every once in a while list. But I have tried to substitute for lower calorie options in my every day eating.
Good quality beer - I absolutely, positively will not drink the mass produced "low calorie" swill that is produced as "beer" in this country. I'm a beer snob can you tell?
I can't stand fat free cheese but I will eat 2% milk or lower fat cheese happily.
Sweetners - I would have a really hard time cutting these out and having to use regular sugar, honey, agave nectar. Too many calories otherwise and I really like some things sweet - coffee, iced tea, tomato pasta sauce, etc..
Salt - I know it doesn't have calories but I've had a hard time cutting this back.
I used to think I couldn't get by without really thick cheesecake but I had some the other day and it made me sick! I think I actually could like a lower fat version of this treat!