[UPDATE: a formula stimulated by a friend's comment: social network + shared data = better patient outcomes.]
If you or a loved one is dealing with a major (or minor) health problem, you really MUST check out PatientsLikeMe.com.
My first reaction to the website: brilliantly conceived and wonderfully implemented.
I've only taken a quick look at it, but the site lets anyone with a disease or medical problem find others going through exactly the same ordeal. You can share your personal story and your opinions of the drugs and treatments you're going through and see what others think of theirs.
The site also lets you look at aggregate data. For example you can see which medicines and treatments are most commonly prescribed for your condition.
And that seems to be just the tip of the iceberg.
Watch the Jamie Heywood's inspiring TED video:
Then check out the PatientsLikeMe.com website.