I've been feeling pretty behind on my sleep lately, and as a result I've been finding pictures of peaceful bedrooms particularly inspiring. White rooms fit the bill, but some beautiful pillows, bedding, and headboards keep things interesting.
The neutrality of a white backdrop gives you plenty of room to mix patterns and have fun with accessories. Upholstered headboards are a more long term way of incorporating color, pattern, and texture, while pillows require the least commitment. A good-looking blanket or quilt can add just the right amount of personality.
(Images: as linked above)