One of my favorite things in industrial and functional art is efficient use of space.  People design their furniture and living spaces to make life work well in small places.  This ins't your feng shui movement/placement, this is getting the best use out of space.  I've seen hgtv shows where couples fit everything they own, neatly and conveniently, in a 400 sq ft condo.  I should pull out some of those links...everything from single foot staggered stairs, to entire walls that move and can be used for storage.  

This little idea of storing books in the staircase is pretty awesome.  Kallie and I have a lot of books, and if we ever live on a boat, this would be one place we could store them all.  Kind of gives a new meaning to treading lightly on the words you speak.

http://www.geekologie.com/2008/02/bookshelf_stairs_are_freaking.php

 http://www.apartmenttherapy.com/ny/at-europe/at-europe-london-closeup-the-amazing-staircase-042543