I've tried a few different desktop organizers for windows, and this one is, in my opinion, the best (easiest, quickest, simplest, nice looking)

http://www.stardock.com/products/fences/

 It's a great app that will allow you to drag out labeled boxes on your desktop so that you can drop desktop icons into groups.  You can then drag, size, move and place the groups as you wish around your desktop and it will retain your layout after startup.

My desktop used to be cluttered and now it is beautiful.  :)