These patterns work in rooms where you want a sense of calm, says Holly Becker, a stylist at Decor8Blog.com. Her favorites places include bedrooms and spacious master baths. One caveat: no great rooms or living rooms. There, small prints often fade out and get lost in the largeness of the space, a problem that's identifiable only after the paper is up.
Holly Becker is the author of Decorate Workshop: Design and Style Your Space in 8 Creative Steps (Chronicle Books).