Social Media: The Newbies Survey

I’m conducting a quick survey. What advice would you give to newbies (in particular, journalists) dipping their toe in the social media pool for the first time? Should they blog, open a twitter account, or would Facebook be a better option? Is G+ a ghost town, or an exciting new development? Is LinkedIn worth it, or a haven for Make Money Fast spam?

Update: Replies to this survey from Twitter, Google Plus and Facebook can be seen at The Wisdom of Crowds.