You need to find a rug and throw pillows you like and a bookcase on the TV wall could be useful. Also, add a credenza for under the TV and a coffee table.

Right now, everything is neutral. Think about an accent color you would like and then begin looking for those textiles. You can go with a traditional rug with geometric or tribal designs like a kilim, or something modern and graphic if you prefer. I think a more traditional look would play nicely with your modern furniture. Once the rug is chosen, look for throw pillows that coordinate- they should repeat the background color of the rug- they can have another color too, but the key is to repeat the main color. I think red would be nice with the gray you have.

I am not sure what to do about a coffee table. I am sure someone here will have a great suggestion.

Good luck with your project. Your place is going to look great. I love your art collection.

Please move your painting down so that the bottom edge is about 8 inches above the top edge of the sofa. Find a console for the TV that is quite a bit longer than the TV and rather low, with doors behind which you can hide the messy stuff. Google TV consoles and you'll find hundreds of styles in every price range.

Put up a long curtain rod, long enough so the curtains clear the window when they're pulled back, below the narrow window and put up curtains that are fairly light in color so the room doesn't look smaller. I suggest a carpet that is fairly colorful, and it would be great to use your painting as a color inspiration. You need warm colors to offset the gray of the wall and couch. Definitely a few pillows in colors taken from the rug. Move that gray bench thingie, perhaps to your bedroom, and find a small but comfortable armchair for added seating. Forget about the horrible overhead lights and get at least one table lamp (two would be better) for warmer lighting that doesn't turn people a ghastly color. A few pillows in happy colors so your furry friend will have something to cuddle against.

Put a carpet under the entire seating arrangement. Since you don't have any patterns in this room yet, you can get a patterned carpet in a small print. Have the main color match the couch. Keep the ceiling light off - that does no one any favors in the living room. Instead, much better are table lamps or wall sconces at chest height in each corner. The wall art above the couch - bring that down a foot. Put more wall art to the left and top of tv. Add curtains for a finished look - same color as walls. I agree with adding a credenza for under the tv. Keep in mind your storage needs. One can never have to much storage. Remember to take advantage of the vertical space, however, don't fill every nook and cranny. The eyes need places to rest. Love your doggie!

I would look to the painting over the sofa for color inspiration, choosing one or two of the colors to repeat in the rug. I'd probably look at red (as a primary color or as a secondary color with neutrals), in an oriental or small-scale geometric pattern. Make sure it's big enough to anchor the space; you don't want a small rug that looks like a bath mat in the middle of the room. Extending under the front feet of the sofa is good.

Your sofa kind of gets lost against the wall with the gray-on-gray. Is painting an option? If not, would the layout work if you put the sofa against the lighter-colored wall?