Omit the butter and add artichokes or thin slices of ham, carrots and mushrooms. For dessert, skip the pumpkin pie and make apple crisp. The crust is high in fat, so if you skip the desserts with crust, you have cut out some fat. It can be used to flavor salads and really anything where you want to add extra flavor. I've heard eggnog is pretty bad.
Pecan pie is probably the worst.
Desserts, in particular, are the worst. If you can, use poached fruit instead, that would help. I have made chocolate pies before using pudding where you use nonfat evaporated skim milk as the base and a topping using cool whip. Make a very rich-flavored chocolate pudding with some coffee crystals to give it more depth in flavor. There are some low-fat pie crusts.