“a plenary indulgence, granted under the usual conditions (sacramental confession, Eucharistic communion and prayer for the intentions of Supreme Pontiff) to the faithful who, on the Second Sunday of Easter or Divine Mercy Sunday, in any church or chapel, in a spirit that is completely detached from the affection for a sin, even a venial sin, take part in the prayers and devotions held in honor of Divine Mercy, or who, in the presence of the Blessed Sacrament exposed or reserved in the tabernacle, recite the Our Father and the Creed, adding a devout prayer to the merciful Lord Jesus (e.g. ‘Merciful Jesus, I trust in you!’);
A partial indulgence, granted to the faithful who, at least with a contrite heart, pray to the merciful Lord Jesus a legitimately approved invocation.” — https://www.ewtn.com/devotionals/mercy/decree.htm
Divine Mercy Chaplet in song: https://www.youtube.com/watch?v=DYtxixBnVGg
Diary of St. Faustina pdf: https://liturgicalyear.files.wordpress.com/2012/10/divine-mercy-in-my-soul.pdf
Amo Iesu by Grace Pax 