Something else that works well is the layering of different shades of the same color. You can do it with pretty much ANYTHING. In my seating area, I mixed in a grape-toned sock monkey along with an embroidered snowflake pillow to bring a little Christmas to the couch. And, yeah, I'm pretty sure I'm so in love with the little stuffed primate that he's gonna sofa-surf all year long.
3M adhesive hooks?