You also want to avoid the mistake of having too many pillows if you want to create a serene environment, according to Keuleers.
"People tend to get excited when it comes to decorating their brand new sectional and go overboard on throw pillows," Keuleers told Insider. "Having too many pillows on a couch can feel overcrowded, uncomfortable, and even adds to the mess since pillows usually end up on the floor to create space for guests."
If you have a sectional, stick to three pillows in each corner, said Keuleers. For people who have a sofa, placing two pillows on the side of the room that is less busy and only one pillow on the opposite end adds balance to the space, she explained.