[colept]

One book that I recommend to anyone looking to improve their communication skills:

Systematic Theories of Argumentation http://catdir.loc.gov/catdir/samples/cam041/2003046181.pdf

I took a course in college which focused upon the different ways you can perceive or approach an argument. The lessons learned apply beyond the scope of debate and argumentation, and have changed the way I look at all interactions as a form of negotiated communications.