If you have a fireplace you don't use or happen to salvage a fireplace mantle, you can totally re-purpose it as a headboard! Flickr user Jennifer is utilizing the awesome molding (and perfect width) of her salvaged fireplace as a headboard for her charming-as-hell bed. She was able to snag it from a carpenter friend from a home that was being demolished. Total score. Plus, a mantle equals extra shelving for books and knick-knackery.
Another lesson here is to watch where you undress, because your cat might be positively SCANDALIZED.