Watch the Funk It online guitar lesson by Jeff McErlain from 50 Eclectic Blues Licks You MUST Know
Here is more stuff I learned from James Brown, here I am mixing some cool chord stabs and popcorn picking.
Note how my right hand keeps chugging along on those 16th notes. It is key to keep that hand going as it propels you along in the groove. It's funny how the whole thing can fall apart if we don't keep that right hand moving. Now on the flip side of that we don't want to be too literal with the 16th notes by playing too many of them. So I like to think of my right hand like a record needle, I will lift my hand up some of the time so I don't sound every 16th note.
Try it, it really helps!