Facebook - I get it. Just. It's good to share stuff with family members. Only one or two of my Facebook "Friends" are real-life friends. My facebook profile: https://www.facebook.com/tim.hoddy/

Google+ - Seems to be a nicer interface than Facebook but few people use it. https://plus.google.com/108152498245399885013/

Twitter - I don't get it. What's the point? http://twitter.com/timhoddy