I started using the GuitarGrid method for improving my guitar technique. I'm not sure how well this works, given that I actually have knowledge of music theory, but we shall see. Hopefully, it will provide a nice refresher upon which I can build. I have been called on to play several times recently, and although I am still comfortable performing for people, I'd like to limber up a bit and improve my scale work. More posts on this as it comes along.