This is definitely worth visiting website for any guitar player. I mean, when I visited it first time, I came across an article which explain avoiding any related injury which may happen in hands. I had issues with my left hand, I treated it, but in that article I found ways how to avoid injuries. I'm not professional at guitar but I found many interesting ideas in other articles, such as warming up, different practice, etc. They call themselves a guide like resource for guitar players. One of my best bookmarked websites :)