Mastering Keys is about learning 3 Big Ideas in each key:
1. Which chords make up each key?
2. What are common ways to arrange those keys? (Chord Progressions)
3. Which soloing scales sound good with each key?

See how it's done on the ukulele in the Key of C Major, and then assess yourself with the free Mastering Keys Checklist located at: https://www.fretboard-toolbox.com/mas...

To order your own Fretboard Toolbox books or download free preview pages, click here: https://www.fretboard-toolbox.com/ten...

Hope you find some useful ideas!

Happy playing,
Scott Sharp