First off, no special diet is needed to lose weight but determination is. All you have to do is work off more calories than you take in. 2nd, you don't have to stop eating the foods you love, just limit how much. Push yourself away from the table when your're no longer hungry. Not when you're stuffed. Drink water. It hydrolyzes fat. Believe it or not, wintertime is the best time to lose weight. Why? Well.... the main reason your body burns calories is to maintain body heat. The colder the environment, the higher your metabolism will be to maintain that body heat. People who live in the coldest climates must increase their caloric intake. Those that live in and around the Arctic Circle must consume twice the calories of the average person or they will eventually starve to death. Start a walking program now while it's chilly. There's plenty of walking tracks in the area, but walking a track isn't really needed. Walk in your neighborhood. Forget the treadmill. You'll come to hate it. Get someone to walk with you. Having a walking buddy makes the time pass quicker. I'd advise those 40 and older to consult with a doctor before starting. Shoot, go see Polo-Dog. He's one of the best physicians around and you might be able to get a few fishing spots out of him. If you don't want to constantly monitor your heart rate, a good measuring stick is to walk fast enough to raise your heart rate but not fast enough to where you cannot carry on a conversation due to shortness of breath. Remember too, it's not how far you walk but how long you walk. 30-40 minutes a day will do the trick. Wear gloves while walking in the cold. Swinging your arms will create a wind chill factor and your hands will get cold fast.
One last thing, larger muscles burn substantially more calories . Consider a weight training program.