Yeah the meathods your already doing a pretty good . Would like you to add up Social media marketing ( Creating an ingenious FB app. and marketting via. tht ) . So social bookmarking in sites like DIGG , Stumleupon and bring the traffic to your articles , Try PPC .
Theres some pretty good directory submission services out there try easysubmits.com its a great free service! it will get you some good high page rank links
Definately leverage the social media networks available to you. Get a Facebook fan page, set up a Twitter account and get involved with the LinkedIn community. Also, make sure your site is optimized for search. I'd recommend SEOmoz for help with that. And lastly, once you start getting a decent amount of traffic, launch a retargeting campaign to account for the innevitable visitors who will leave your site without converting. Best of luck to you!
Find partners, do JV's, affiliate partnerships, paid traffic, etc. Something more serious and with more essence.
try a few ezine ads they can get instant results but be careful to research who is reading the ezine first