I'm using pre-wired pine cones, but if you don't have them available you can wire your own cones.
Scatter them across the design . . . maybe even cluster a few here and there.
Cones are such a great part of a winter design and gives a lot of texture and contrast.
Don't neglect the top of your tree - save the smaller cones up towards the top.
Now let's see about adding a little glitz and glamour to the tree.