ShiroKuro Analyze the score to find sections that have the same theme or other commonalities, those would be labeled similarly. For example, A1, A2..... then if you need to break them up into smaller pieces, you could do A1-1, A1-2 etc.... This way you don't run out of the alphabet, and you see connections across the score.
Thanks, this is very helpful! I think I should "get it right" before I start to mentally associate the chunks with a label. I am currently thinking big sections are A, B, C, and inside them I can do A1, A2, etc for memorization phrases. Even if A and C have a similar theme (they're similar but not identical), I can remember that.
This has the bonus effect of if I decide to add or remove a chunk (which I did yesterday), it only affects the numbering for that section and I don't have to adjust for the whole piece!