Here are some of the links referred to in the sessions I attended at the fantastic October 2013 Lavacon conference in Portland, Oregon.
I’ll update as days two and three finish up. Feel free to add yours in the comments!
http://blog.mailchimp.com/new-mailchimp-user-persona-research/

https://community.jivesoftware.com/community/documentation/blog/2013/10/21/why-technical-documentation-needs-jive?author=

http://xkcd.com/1133/

http://www.smashingmagazine.com/2013/04/29/content-knowledge-is-power/

http://pervasiveia.com/book

http://thecontentstrategybook.com/877/

http://www.humanfactors.com/downloads/roi.asp

https://www.vasont.com/resources/prepare-content-for-cms.html