-Make a spreadsheet with the entire year's music laid out in advance
It may help to be in a separate choir yourself just as a member, whether it's a community choir or a diocesan choir or something like that. Apart from my own experiences, I have learned the most from two things, first by being the accompanist in a choir, then by being a member of the diocesan chorale. I watched the directors and if I experienced something I liked, that I saw choir members respond positively to, then I tried to model it.
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