While I wouldn't condone shoving everything into a closet, closing the door, and calling it a day, using fabric is a quick way to conceal a little clutter and just make a visual clean slate. The solution works for any room and also can be a way to add color (Images 1 and 5), create continuity (Images 8 and 9) and delineate spaces (Images 2, 4, 7, and 10).
For smaller projects such as sink skirts, an added bonus is that you can change fabric frequently at a relatively low cost. For about $15 total, Eddie Ross created a tailored skirt with dollar store towels and grosgrain ribbon (Image 3). For instructions on how to make something similar, check out his blog or these directions from Real Simple magazine.
Images: 1. Canadian House & Home via Little Green Notebook 2. Killy Sheer Paradis on Apartment Therapy 3. Eddie Ross 4. Domino via Decor8 5. Dottie Angel 6. Decodir 7. Mat Sanders for Apartment Therapy 8. via Cococozy 9. Barry Dixon Inc. 10. Martha Stewart