Some tips I recently saw on the web that seem to make sense for cluttered closets. Use shower curtain hooks in your closet to hang those things you want to keep off the floor, like purses, gift bags, and other small things that do not fit on a hanger. You can use pants hangers for flat things like wrapping paper and other flat items. A pegboard attached to the inside of your closet door can be used to hang everything from jewelry to watches, and umbrellas.
Those plastic travel soap dishes are great for organizing jewelry, vitamins, or other small small items when traveling.
Try those little magnets to hang stuff on the sides of your medicine cabinet, like tweezers to keep them off the shelf and close at hand when you need them.