Study the color and pattern of your sofa and then add a variety of throw pillows. Mix different sizes, colors and materials for interest and texture. Use warm or dark colors to create a cozy look or accessorize with bold colors to create a dynamic and energizing mood.
Add pillows according to the season. For instance, use pillows with a winter theme during the holiday season or those with colors or patterns that capture a summertime feel when the weather turns warm.
Cover the couch in a slipcover; slipcovers offer an instant way to change up a couch, and they are easy to switch out or clean as needed.
Place a throw or display a simple quilt on the couch for color or texture.