Agree on what Elliot & Josh have posted. Also check out the following, which will be enough to keep you busy for a while:
Associations (websites & LinkedIn Groups):
Marketing Automation Institute (MAI)
Sales Lead Marketing Association (SLMA)
American Association of Inside Sales Profesionals (AA-ISP)
Business Marketing Association (BMA)
Marketing Executives Networking Broup (MENG)
Content Marketing Institute (CMI)
American Marketing Association
Publications:
BtoB (full disclosure - this is published by a division of our company)
Target Marketing
Direct Marketing
Chief Content Officer
Marketing Profs
Rain Today
Blogs (not listed above)--search on company website or use your favorite search engine
LeadMD
Annuitas Group
TopRank
chiefmartec.com
Orbit Media (http://www.orbitmedia.com/blog) & book Content Chemistry
Ion Interactive
ReachForce
Funnelholic
Heinz on Marketing
I'm sure I left some out, but this will be enough to get you started.