When I have the opportunity to sit in on reading sessions, I’m keeping an eye out for any good anthem - whatever the voicing might be. If it has good text, is well-crafted musically and artistically, and is versatile enough to be used more than one Sunday out of the year, I make a note of it.
Everyone has their own rating system for this - some use a check-plus, check, check-minus system, others use smiley faces (with teeth, without teeth, indifferent, sad). To each their own, right?
Anyway, once I get back home with the anthems I saved, I divide them up into piles for easy list-making and cataloging later: Adult Choir, Youth, Children’s Choir, and Ensemble.