Some of my web design students are going to tackle a re-design of our school site soon. One of the problems of building a big site is how to organize it. Most of us have had the experience of going to a site and then struggling to find the page we want. It's organized, but not in any way that is logical to us. A Card Sort is one way to look at how things should be organized from a user point of view.
Create a stack of cards with one page of your website on each card. Have potential users divide the cards up into logical stacks. Then create a label for each stack. The stacks help you create an organizational tree for your site and the labels become your navigational system.
I'll be trying this out with my students.
[via iLibrarian] [Image captured from Card Sorting: http://cardsorting.pbworks.com/]