If you mix and match some of these three note voicing ideas on the top strings you can come up some really cool vamps. A lot of these short vamps can be played over the entire 12 bar progression (i.e. repeated over each change). When you're listening to T-Bone, listen for those kinds of passages and try your best to emulate them. You'll find that he uses a handful of chord shapes, and it's just about mixing and matching the feel, shapes, etc. to fit the vibe of the moment.