Social Media Woes?

I’m on Facebook and Myspace.  I only have the former because of my best friend and the latter has become a music-laden wasteland where my personal bits of interest go to disappear.  Even still, I am on them, though not for networking.

 I can’t have multiple accounts on one social site.  It often goes against the terms of use and sounds more consuming than helpful.  But, if you use a few for personal relationships, how do you use the sites to their fullest potential when you need professional places as well?  (And, before you suggest it, I am VERY uncomfortable with Facebook’s idea of “lists” among your contacts and creating more than one account is a huge no-no anyway.)

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For “business”, I have this blog.  I can meet new people, exchange ideas, include the URL(s) when I get published, and spread my thoughts around like the common cold in an elevator.  But is it enough?

Nearly every writer I meet has a list of social media links the size of Santa’s Naughty List.  Perhaps they’re going overboard.  Or, maybe I’m the one who needs to change.

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So, how many social sites are YOU on?
Which one do you find the most valuable?  Which one is the easiest for you to use?  Am I missing out on anything?