Updated 7/17/15
General Advice
Public Relations:
https://www.gcaionline.com/digital-marketing-news/gcai-desk-produce-videos-pr-budget/
http://firstround.com/review/why-most-startups-dont-get-press/
Social Media Marketing:
https://www.gcaionline.com/digital-marketing-news/gcai-desk-social-media-knight-shining-armor/
Online Advertising:
http://www.ladderdigital.com/startup-growth-adwords/
Digital Marketing:
https://www.gcaionline.com/digital-marketing-news/can-landing-page-6-tips-help-sell/
https://www.gcaionline.com/digital-marketing-news/gcai-desk-picture-5-steps-improve-visual-content-marketing/
https://www.gcaionline.com/news/7-simple-tips-conquer-google-boost-seo-strategy/
https://www.marketingprofs.com/opinions/2015/28989/the-biggest-mistakes-entrepreneurs-make-with-digital-marketing?adref=nlt120815
https://support.google.com/adwords/answer/3210317?hl=en