NYTimes' sections on Health and Science appear on Tuesdays. The Health section, in particular, always has some useful stuff. Today, it has two articles on websites that provide reliable information on health and medicine. Let me just point you to them:
Favourite Health Resources: "Science Times asked some of its contributors for their favorite resources on health, whether online or in print."
Logging On for a Second (or Third) Opinion: "... [P]aging Dr. Google can lead patients to miss a rich lode of online resources that may not yield to a simple search. Sometimes just adding a word makes all the difference."
These two are worth checking out too: