I have always loved the monochromatic, all-white look. It always reminds me of The Virgin Suicides (the film). It has this certain innocence about it that can also be very chic. Head to toe white is a timeless summer look, too. Put on a couple of key pieces, blend your textures, and you will always look sleek in all white. On that same note, I think that even one piece in some shade of white will simplify any look and clean it up a notch.