Keys to a Southern Accent (outsider perspective)

I've known how to talk like a generalized redneck for some time now, but appreciating the southern variety of speech is a new pastime and evolving science for me.

Two key words that have distinguished southern speech from my perspective:

Water- pronounced "wudder"

So- Southern "so" is often separated into two syllables:

"sah-oo"

with the "oo" making roughly the same sound as the "u" in "wudder."