Our related post on the Blogging Musician's site: http://adamharkus.com/unlocking-fretboard-understanding-key-signatures-guitar/ Our website: https://tunein-toneup.com/ Our dedicated post for lesson 13: https://tunein-toneup.com/2017/05/05/guitar-lesson-13-how-to-practice-without-a-guitar-and-further-rhythm-ideas-and-alternate-tuning/ Guitar Lesson 13b: PART 2 - Here, Dan really helped me out by giving me some superb ideas for what to do while unable to practise and how to develop my musical understanding of keys and the fretboard without needing to use the guitar. Very helpful as I currently have some tendonitis making it difficult to play. Check out this post on this topic by TITU: http://adamharkus.com/unlocking-fretboard-understanding-key-signatures-guitar/