The Book of Common Prayer is full of prayers, obviously.  This page puts together blog posts on the Collects of the Day and the Occasional Prayers in the 2019 Prayer Book.

Collects of the Day:

• Advent 1
• Advent 2 “the Scripture Collect””
• The Conversion of St. Paul
• Epiphany 3 & World Mission Sunday
• Epiphany 4 with a hymn
• Epiphany 5
• Lent 1
• Easter 3
• Pentecost (first collect)
• Proper 7
• Proper 8
• Proper 10: the evolution of a collect
• Proper 12: praying humbly
• Proper 12: a mini sermon
• Proper 13
• Proper 21
• Proper 28
• Nativity of St. John the Baptist
• St. Bartholomew
• Rogation Days

Occasional Prayers and Thanksgivings:

• Occasional Prayers 27-39: for the nation
• Occasional Prayer 43: for Social Justice
• #53: for those who travel
• Occasional Prayer 70: Inner Renewal through the Word
• Occasional Prayer 71: For Christ to be formed in us
• Occasional Prayer 88: for Daily Growth (St. Anselm)
• Occasional Prayer 92: for satisfaction in Christ
• Occasional Prayer 102: for Sundays
• Occasional Prayer 123: for Deliverance from Peril