People on dA tend to view art more than stories, also because they can easily drag them into faves without clicking on them. Maybe pimp them on livejournal, tumblr, the RA forums, etc? or make art for them and then provide links in the comments! *shot for using these methods of shameless self promotion*
But... self promotion is lame! (and asking friends for promotion is even more lame xD) I already made a post on tumblr for each of my fanfics but it seems they remained unseen. And nobody looks in the ra forums anymore... especially cuz the site is so laggy.