Thanks to my Giggle Trio (AKA Tess, Gabriel & Danielle) for sharing these rules of ensemble playing and rehearsing. It's quite the work of art, which I think applies to ALL ensembles:
Thanks to my friends Trudi and Nicola (fellow music teachers) for this one. A witty comedian does a musical sketch on Pachelbel's Canon in D. Enjoy Pachelbel Rant: