From Wired Magazine's "New Rules for Highly Evolved Humans" section of the August 2009 issue.
Practicing good nutrition keeps your mind sharp, your body fit, and your life long. The same could be said for consuming media. (Seriously, knowledge is power.) When you add it all up, the average American spends roughly nine hours a day glued to some kind of screen, and like your diet, quality is as important as quantity. Here areWired's suggested servings for optimal media health.
Found on Nathan's Flowingdata.com