I'm in love this week with my new book clip!!!!!
I got it at The Container Store and is called The Original Book Magic- Book Clip & Stand. Its super simple and without the bulk of other book stands. Its like a mutant paper clip that holds down the pages at the spine just to give u an idea of how it works.
I found them online by googling book magic clip and found this site: http://www.ezbookclip.com/index.htm (the prices and checkout page are here)
My thumbs and neck are happy and I can take this anywhere! I give this my full endorsement!!!