"There's something about a layered room that exudes personality and makes a space feel and look 'lived-in' in all the right ways," says interior designer Maureen Stevens. "One of the ways to achieve this is by mixing patterns." Maureen offers three tips for mixing patterns effectively: First, use three to five patterns, each on different scales. "If you have three patterns, choose a large scale, a medium scale and a small scale accordingly," she advises. Second, stick with a concept and theme when choosing patterns so they collectively work toward a cohesive design concept. Lastly, add solids. "Just like a room needs negative space, patterns also need to be broken up by adding solids in between," Maureen says.