There is no counting how many times I have turned my fingers from my ‘ukulele to a pen when I needed to wrap my mind around something. Sometimes it’s best to get off the strings and look at things from another angle. That’s where a big stack of blank fretboard, chord diagrams, and tablature can come in handy. Trust me – it beats drawing the lines yourself.
Some uses I’ve found for each included with the link:
Chord Diagrams (8×4)
Writing out a box diagram version of a song with many different chord shapes, remembering new or cool fingerings, notating scales.