This fascinating site from the U.S. National Library of Medicine is packed with resources loosely organized around clinical effectiveness research in medicine. There are six main sections of the site: Contents, Behind Headlines, What's New, Featured Review, Understand Clinical Effectiveness, and Blog. Featured Review is a great place to start as it links to the current review as well as those previously featured. Topics range from the efficacy of powered versus manual toothbrushes to exercising with asthma. The Understand Clinical Effectiveness section offers some very educational links that describe not only what research is out there, but how to become a critical consumer of that research.