Depends on the size.youcould use 6000glue to adhere cork to it and use it as a message center.you could use it on a dining room table or coffee table as the base for an arrangement of seasonal items.
I've done a wall of mirrors in my bedroom. Turns out I'd been buying mirrors for years and didn't realize it. My wall has everything from antique, vintage, contemporary, wood, presses design, plastic, shells but they are all things I love. The glass or mirror runs the gamet from dark and crazed to new. So, why not hang your mirror and enjoy its beauty.
If you are planning on replacing or covering the mirror, you could cover the mirror with window film - they make some gorgeous designs. Or you could create art to fill the frame using some gorgeous fabric. Check out throws, flat sheets and fabric shower curtains for some reasonably priced fabric. Even a tablecloth.
can you post a photo?
You can repurpose it as a serving dish, part of your home decor (using it as a base for a table center piece) or upcycle it into a TV tray.