GQ: A 10-Step Guide to Not Dying at Your Desk
GQ Magazine's October 2011 issue recommended the Freedom Headrest in Josh Dean's 'Don't Let Your Desk Kill You'.
Check out GQ's quick reference office ergonomics slideshow
Keep your horizontal line of sight aligned with the top of your monitor. And be sure your keyboard and document holder are also in line with your body to reduce neck and shoulder strain.
Ergo Gear Guide