Bolster pillows are a nice alternative {or addition} to using common square/rectangular pillows. They look great in simple solid colored fabrics which don't detract attention from their cylindrical shape.
Here they make an appearance in the loveliest of rooms, looking fabulous on the sofas and chaises:
L: via house beautiful; R: via house and garden
via elle decor
L: via domino; R: via decorpad
via brides.com