Changes in diet make a giant difference. Not only eating less, but eating quality foods. In the winter, I eat alot of fruit, nuts and cereals. Kashi has a new cereal out called 'Vive' that's high fiber and probiotic. I've lost a bit of weight since trying a probiotic diet, but I feel much better. All of the bad stuff that sits in your digestive tract is a root cause of many things. Cleaning yourself out aids digestion and helps you to lose weight.
And self-control is a big thing. I'm not saying not to eat a piece of pie, but make it a small piece and only have one...
Stop drinking beer...empty calories
Stop drinking soda...empty calories
I actually practice no calories from fluids during the winter months...