One idea is to decorate a round mirror with small ornaments like miniature trees or snowflakes, or even real berries and pinecones. You can also use Christmas lights around the mirror to create a festive atmosphere. For a more subtle look, you can simply use a gold or silver frame and a red ribbon to tie it up. Alternatively, you could use a wreath as the centerpiece and hang it in front of the mirror. There are so many possibilities, so let your creativity shine!