http://www.gladwell.com/2002/2002_03_25_a_paper.htm
A great article about how people use paper that I picked up from John Udell's Weblog. I noticed the similarities between how air traffic controls use paper and how the movie business uses paper.
I think may be a very handy way to design XML schema's, create your elements on small strips of paper and then by moving the paper around you can quickly create or change schema's during the design phase. You could also create multiple schema's for comparison that could be pinned to a walk or laid out on a table or a white-board.
Why do this? Have you ever opened a complex schema, especially a database diagram, on a laptop? Until we have virtual display spaces of about 60 inches, think Minority Report, this could be a very handy way to design.
Sean