Create a page of all WHITE things. This could be an art journal page or a mixed media collage. Cut out imagery from catalogs or magazines that is white, off white, cream, and include a little bit of black or brown to balance out the whiteness. Add fabric, white cardstock with small patterns, postage stamps, text with white background, try to get as much variety as you can.
This is a 9x12" art journal page on heavy cardboard in whites that I created for a guest post at Creative Every Day. The dark brown is actually the background cardboard's natural color.