I think that those of us who have reached our goal are afraid that we will regain the weight we lost. And statistics tell us that most individuals who have lost a sizable amount of weight do regain it.
I've maintained my weight loss for several years now. My most useful tool to maintain my weight loss is my scale. I weigh myself every morning!!! I don't miss a day. Therefore I can see for myself if and when the lbs. start to creep back onto me, and I can do something about it immediately.
Yes, I plan to enjoy Christmas. There will be goodies that I will sample that are not on my maintenance plan. But I will be a bit cautious so that I will find myself in 2012 without a lot of unwanted weight to get rid of.