I really like some of these ideas to dress up a blank wall.  Being partial to photography, I like the gallery wall concept but the other ideas suggested also work well.

Crown Molding

If you’re going to get technical, crown molding doesn’t exactly go on the walls, but rather between the wall and the floor and the wall and the ceiling. But it can help transform a just so-so room into one that’s elegant and that looks finished. It’s a job that can be done on your own (we hear you can, anyway) as long as you have a saw and some mathematical ability to figure out mitered edges. Or you can hire a mathematician/contractor, like we do.

Trim, trim, and more trim

There are a thousand ways you can use trim to dress up your walls, from traditional chair moldings or classic wainscoting to something a little more unique and future-forward, and you can see just about that many here. Add in a healthy dose of color to create a bold ad interesting look.

Home DepotWallpaper

Perhaps nothing gives you that instant pop like wallpaper. If you really want to make it interesting, choose something with pattern or texture, or both! One more tip: If you have odd angles or walls that aren’t the same length, or you’re just trying to create a little interest in a boring spot, you don’t have to cover the whole thing. A strip may be all you need.

Internet Home AlliancePainted feature wall

Painting a feature wall is a good way to pump up the design in a room, and also to dip a toe into the world of color without letting it take over your whole space. The best part: If you don’t love it or you get tired of it quickly, you can paint over it and start fresh with a new hue!

Internet Home Alliance“As soon as you paint this statement wall, THAT will be the new feature of your room,” said Hill District Mums. “So forget about your expensive sofa, your brand new quirky rug or the amazing print you ordered online. Are you ready to make them the second most important things in the room? A feature wall is bigger than all the other pieces in a room. It is at your eye-level and normally a color that catches your eye.”

Rustic reclaimed wood

Love the reclaimed look but don’t have a barn handy? Or maybe you don’t want to go to the hassle of picking out and purchasing wood, and especially having it installed. Artis Wall might have just solved your problem. This easily installed and removable product can help you create an accent wall in no time, with tacky strips that you simply peel off when you’re ready for a whole new look.

Houston ChronicleA gallery wall

Framing family pictures and creating a wall of memories has long been popular. But you can give it a modern twist by having your photos printed on canvas. You choose the size, upload your pics (even from Facebook or Instagram), and pick from filters including black & white and sepia.

Large-scale art

Or maybe a gallery wall isn’t for you, no matter what format you use. “Forget the gallery wall. What’s hot is statement art,” said POPSUGAR. “Large pieces — over 5 feet — were searched four times more than small art. These statement pieces, especially tightly cropped scenes, provide designers with the ‘wow’ factor they used to seek from an eclectic mix of smaller works.”

Sites like Overstock, art.com, and icanvas, where we found this large-scale abstract from Julian Spencer called, “Rain Clouds,” offer an amazing amount of options and often have coupons for substantial discounts on their site (Rain Clouds is available in several different formats and sizes; this one is 40×60 and priced at $261 with a current 55% off promotion).