If you have created a product, service or content that you now want to tell the world about, you had better get savvy on leveraging social media.
Here are a list of sources for information Social Media / Advertising & Marketing:
http://careerinsiderorg.tradepub.com/
(select the marketing tab topic on the left and also advertising and promotion)
http://www.hubspot.com/marketing-resources
http://blog.hootsuite.com/category/resources/
TradePub.com in particular has some amazing free e-publications in a variety of topics.
Check it out.
A discussion about content ownership and going indie will be coming soon!