Okay, I hope I don't sound like a Debbie downer but this has been my experience with doing diets before Christmas.
I always gain the weight back, because Christmas sends me into a downward spiral. I always think "I did so well I deserve a treat."
So, I think it's a great idea just be aware of that trap when Christmas comes around. I think my problem is since the last few years I have lived away from my family and go visit them for 2 weeks every Christmas I have very little control of my food and I hate annoying people about my diet and feeling like I inflict it on them. But I think this year I will make an effort to buy some of my own groceries while I am there.
Does anyone else have Christmas tips that they do not to regain the weight?