I was just recommending that a friend join Twitter with the express purpose of following Pam RuBert aka PamDora. As I was looking for a link I went to her site - was rooting around and stumbled on this article about organizing sketch books. Great information. I am off to add tabs to my sketch books right now!

http://pamdora.com/blog/2009/03/26/twelve-tips-for-organizing-your-sketchbooks/