Top 20 Social sites: 1. facebook 2. linkedin 3. tumblr 4. twitter 5. pinterest 6. universalhunt 7. reddit 8. StumbleUpon/Mix 9. medium 10. quora 11. myspace 12. scoop.it 13. Instagram 14. dribble 15. pocket 16. digg 17. slashdot 18. wehearit 19...
