find something in your house that you absolutely love the color of, not a color that you think would be good for decorating necessarily, but a color that makes you feel really happy. it could be any object in any color, but your closet or your jewelry box would be great places to look. paint the walls that color, get handtowels a couple shades darker or lighter, and let everything else (floor, ceiling, fixtures, trim) be white. you can also get a couple of white picture frames and put up photos that pick up the same color, or a fun print fabric in those colors, or something like that. rug optional.