Okay, so first you'll need some wire and some pine cones. You can find both of these at any craft store. Once you have those, just take the wire and start wrapping it around the broken branches, making sure to secure the wire tightly so that the branches don't fall off again. Then, take the pine cones and glue them onto the wire to give it a more natural look. And voila! You've got yourself a new and improved Christmas tree!