Need ideas to make mirror standout.

paint the frame

Look for wood or plastic appliques or embellishments that you can glue on then paint the frame a brighter color. there are many to chose from or make your own

I wish I could see more of the room:) But it looks like you're trying too hard... On it's side, like you're trying to make it big. Having it sideways, perhaps a shelf underneath, like a mantel. That would open up lots of ways to add weight to that space. & do consider hanging it the other way, with something underneath it, a chair, small table with tall flowers, a couple smaller frames on one side... it may make a bolder statement. Would love to see what you do. Happy decorating:)

Paint it. If you don’t want to change the way it’s hung, and you’re handy, buy wood trim and add another “layer” of framing around your frame.

Its yard sale season. Measure the mirror and keep your dues open for an ugly picture in a great frame the right size.

You could decoupage the frame for more interest. (see pic) You could add a very narrow but wide table with small lamps on either end. Or you could add wired in lamps on either side on the wall, or you could make a centerpiece of the mirror by hanging 3 or 4 same themed prints on either side. .. botanicals maybe. You could put small shelves to hold flower vases on either side. Lots of ways to emphasize the mirror.

Add LED lights on the inside frame border or Etch a border or use decals. I agree w Anna that adding a shelf underneath would create a focus. Maybe a glass shelf rather than something solid. And her suggestion of a table under it like a narrow console table would look nice and add balance.

A small / medium picture on either side with frames to match or compliment the frame of the mirror. OR Candle sconces on either side of the mirror.

Examples

I see what you mean by the mirror looking lack-lustre. I am wondering if it is just too small for the wall space that it is hung. Having a larger frame would make the whole mirror seem bigger.

This size of glass with a much wider frame would instantly make a stronger visual impact, especially if it had texture or color. If you could mount the mirror on a backing with wider perimeter, you would then have a wider frame area to decorate in the style that matches the rest of the room.

I took the liberty to blow up your pic to get an idea of your decorating taste in the opposite side your pic.

It looks like you prefer a conservative neat style but with a splash of pizzazz.

How about removing the current frame since it is really small and contoured, which is limiting to what your options are for framing it out.

I am partial to a subtle checkerboard design in any home.

I have attached some pics of tiled frames you might be interested in creating in lieu of the existing frame.