I Saw it in the Bulletin...

General Instruction of the Roman Missal (link to open the pdf version of the document)

Vatican II Document on the Liturgy, Sacrosanctum Concilium

I Heard Him Talk about it in a Homily...

Blessed John Paul II, Novo Millennio Ineunte

Saint Kateri Tekakwitha biography

Vatican readying for Mohawk Saint Kateri Tekakwitha (CBC article)

Book Recommendations

"Prayer Primer: Igniting a Fire Within" by Fr. Thomas Dubay (Amazon link)

"Fire Within" by Fr. Thomas Dubay (Amazon link)

"Difficulties in Mental Prayer" by Fr. Eugene Boylan (Amazon link) (Google Books link)

I Heard Him Talk about it in a Homily...

Abandonment to Divine Providence (read online, pdf, mp3)

Abandonment to Divine Providence (amazon.ca link)

I Heard Him Talk about it in a Homily...

Litany of Humility (pray with caution!)

Assumption of Mary

Munificentissimus Deus (Pius XII on the Assumption of Mary)
Assumption of Mary (Wikipedia)