o YouTube videos or similar of Masses, chanting or otherwise, to help with chanting the Mass.
o Quality recorded versions of good Masses (for music; if something worthwhile, then also regarding gestures, postures)
USCCB's Sing to the Lord: Music in Divine Worship and the Spanish edition Cantemos al Señor: La Música en el Culto Divino) are available from a variety of publishers and are essential guides for clergy and music directors.