Turn the fireplace mantel into a focal point using color. You can hang different-colored stocking or you can display an array of floral ornaments, also featuring a rainbow of colors. You can even borrow a few ornaments from your Christmas tree and display them on the mantel in a creative way. You can use candles to decorate the mantel and make it glow. Use candles of different shapes and sizes and votives and arrange them as you find it fit. You can also use a few other things in between, like pine cones, Christmas tree branches, tree ornaments, etc.
A great idea for a decoration would also be a wreath. This is an item that you can make when you have a bunch of small driftwood pieces but no idea what to do with them. The wreath is really simple to make. You just need to glue together the driftwood pieces to form a circle. Hot glue is preferable in this case. The wreath would make a nice decoration for the entrance door or for the wall.