I think the whole website is informative, but I really liked the communications section.
http://www.successful-project-management.com/project-management-communication.html

I especially like #12
http://www.ofm.wa.gov/ocio/pmframework/initiation/planning/communications.asp

This is not for everyone, however, they provide a lot of free resources. The concept here is much deeper than what we touched on in Mersino's book, but I think they are related in that, if you took the time to be this aware of yourself, imagine how that would affect all of the relationships around you - professional and personal.
http://www.ojaifoundation.org/

http://www.businessballs.com/project.htm#project-management-tools

I thought this site, though not super pretty, provided good resources.

http://www.govloop.com/page/project-management-council

I subscribe to a lot of topics here and I find they provide a lot of free literature and have interesting blogs! Check out the Project Management Myths Debunked section, it is funny but true.