The TV stand is too small for the TV. Take the table on the left wall and use that as a TV stand. Rip the paneling. Maybe a new ceiling fan. Get rid of half the stuff on the shelves.

Agree with Paulette and would add to keep in mind future use when looking at rugs and pillows.

Is the room actually this long and narrow? I'm thinking the seating could be pulled in toward the tv a bit, but it could be a poor perspective in the photo, it's hard to tell.

All in all the house looks clean and well-kept from here and that's the first step, next is removing personality :)

In addition to what has been said, furniture placement is a must. I'd move the sofa in front of that cabinet on the left, and put the lamp that's on the end table on the cabinet on the left, this will give you two lamps on that table. Add a piece of artwork to that wall. Move the loveseat near the window to across from the newly placed sofa. Move the chair to the space that the sofa currently occupies.

pulling the furniture off of the walls to make a walk way around the room would make large room more cozy with conversation areas. Even better put the TV on the wall with a plant under the TV the rug and pillows ARE also great ideas to add color try a throw as well the blinds are slightly dated so I would suggest taking them off completely depending on the targeted clientele you are looking for and add long draperery panels on either side which you can get from Lowe's, I would take an educated guess and say the sliding glass doors are probably 7 feet drape panels are usually sold in pairs so I would go with similar colors as the pillows throw and rug and go no shorter than 84 inches, best of luck and keep in mind you can take these options with you to your mother's new place or use them at your home.
best of luck
julian

I would empty the condo. Clean it to perfection (it already looks immaculate). Let the buyer move in to a great space and decide what to put where.

Sometimes, nothing is more.