PC-109 Practice Without An InstrumentMany of us often find ourselves in places with nothing to do... on a train or plane... a boring class at school or a dull meeting... and now you can use that time to practice guitar.As well as using visualisation (Effective Practice 8) there are a number of things you can work on without a guitar which can really help your development!Other ideas not in the video: Memorising intervals on the guitar neck - the shapes they make. ery helpfulfor your auraltraining!