The first thing that goes on the Christmas tree is usually the lights. They provide a festive and colorful glow that sets the mood for the holiday season. After the lights, you can start decorating the tree with ornaments, tinsel, and other festive decorations. It's also a good idea to add some special touches like garlands, bows, or even homemade ornaments made by the kids. The Christmas tree is the centerpiece of the holiday season, so it should be filled with things that bring joy and magic into your home.