GROUPS MARKETING : A group is where various people discuss various subject in a platform . There has many groups which may have thousands visitor . So for getting traffic for your site it's another approach to join this group and share your site URL by joining any discussion with them .
Some group sites are
http://groups.yahoo.com/
http://www.grouply.com/
http://groups.msn.com/
http://groups.google.com/
http://www.meetup.com/
http://ca.yahoo.com/
http://www.delphiforums.com/
https://www.bigtent.com
seogroup.com/
www.torontoseogroup.com/
groups.drupal.org/seo
www.pittsburghseogroup.com/
Go this group signup first , made a account , and start to join some group and share your URL with them by submitting a article about your Site .