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 sometimes, tablature comes in handy. Trust me – it beats drawing the lines yourself. This “stage” of writing things down never really ends, but I found it most helpful when I was learning concepts like building chords or memorizing the fretboard. Some uses I’ve found for each included with the link:
Chord Diagrams (8×4 boxes) -Writing out blocks of chords that are in a song (especially one with many different shapes), remembering favorite shapes that you find when building chords from scratch, writing down scale shapes.
Chord Diagrams (12×3 boxes – landscape)
Tablature - Writing out a song, picking part, chord sequence, arpeggio, scale, etc…
Tablature and Standard Notation - For relating notes on the fretboard to their pitches as they appear in standard notation.
Fretboard Chart - Fill in the blanks to memorize the notes, find arpeggios, write out multiple inversions of each chord.
Blank Fretboard Chart - Circle the notes of a certain scale, chord, arpeggio, finding all locations of one note as fast as possible.
If your needs are more classical you can find fully customizable sheets for free at: http://www.blanksheetmusic.net/