Another way to create a simple layout is to limit yourself to one color--a monochromatic color scheme. Create a layout using only 1 color (or varying shades of one color) for 15 pointz. Do one in all white and I'll give you 20!
Here are a couple of examples. My pink one cheats a little bit with the white touches but I'm sure y'all can do better! ;)
Be sure to post your layouts in the correct section of the MB.
Have a wonderful weekend!