LinkedIn, for those of you evaluating the effectiveness of social media channels).
The most promising of these, whose depths I have yet to plumb, is InternsOver40 -- a blog about people making intentional and sharp career changes later in life.It's laid out a little capriciously, IMO, and somewhat hard to read, but the content makes it worthwhile. I look forward to following it.
As I began to explore the material on this blog, I found links to other sites with a similar theme which, in turn, linked me to things like skills assessment tests and the like. It's like...I don't know...a "web" or something.