I've been playing guitar for around 20 years now but for the last 10 of those years I've been stuck in a rut that I would like to get myself out of. I'm entirely self taught and apart from a few scales and snippets I've picked up over the years I know next to nothing about music theory. I've also never been particularly disciplined about practicing - I do play every day, but there's no particular structure or purpose to what I do. I play mostly rock, with a sprinkling of blues and a tiny pinch of funk. So, I'm looking for someone who can teach me some theory and help me get out of the rut I'm currently in. I've come across the following names (on this forum and elsewhere), but not sure who's good: George Norval, Keith Mitchell, Colin Black, Stuart Hossack, Scott Cruickshank Anyone got any advice?