Follow a Formula To achieve the quirky boutique aesthetic, Erin incorporated all her favorite design elements: blue hues, stripes, playful prints, midcentury pieces, and a vintage rug and portraits. The different pattern scales keep the space lively. Master the Mix Prints from artfullywalls.com complement Erin’s collection of vintage portraits, a combination of family heirlooms and Etsy finds. (Thrift shops and yard sales are also excellent sources of affordable art.) The mismatched frames amplify the playfulness, but the art still feels cohesive because it’s all the same genre. Choose a Focal Point Layering art on top of art-themed wallpaper from Chasing Paper might have felt excessive if Erin had done so around the whole room. Going with just one wall is easier on the eyes.