"One of the risks of my job is that you are going to be wrong about a lot, " Newhouse says.

FORBES: Glass Menagerie

You know, community colleges are fantastic, and actually that was one of the things my daughter and I discussed.

NPR: Ask Amy: Responding to the Thin Envelope

"My belief is that if you are talking about patient safety, this is the number one problem in medicine, " says Dr. Robert Brook, a UCLA professor and director of health sciences for Rand.

FORBES: Is elective surgery overdone?

"It was one of my best moments because you are an ambassador for your country in the world, " he said.

CNN: August 19, 2012 -- Updated 1510 GMT (2310 HKT)

Once we have an overview of the social media ecosystem, I guess the question you are formulating in your mind is: which one is right for me (or my brand)?

FORBES: An overview of the social media ecosystem