On Facebook, promote on your personal and author page as well as in the appropriate Facebook genre groups you've already joined. (selfpublishingrelief.com)
Fantasy / Science Fiction writer in Aurora is looking for a group for a novel length WIP Willing to follow the standard RMFW format, Early evenings on the weekdays work best Willing to join a mixed genre group or all spec fiction group. (rmfw.org)
Most genre groups on social networking sites like GoodReads and Shelfari have a place on the message boards that is dedicated to free books of that particular genre. (ebookevangelist.com)