Last FYE turned on a light bulb for me... THREE's!

 - -  The Incarnation, The Crucifixion, and The Resurrection of Jesus Christ
 - -  Manger, Cross, and Tomb
 - -  Faith, Hope, and Love
           + "work of faith, labor of love, and patience of hope"
 - -  Father, Son, and Holy Spirit
 - -  Past, Present, and Future
 - -  Justification, Sanctification, and Glorification
 - -  Body, Soul, and Spirit
 - -  Mind, Heart, and Will
 - -  Substitution, Propitiation, and Redemption
 - -  Abraham, Isaac, and Jacob
 - -  Sarai, Rebekah, Rachel
 - -  Jesus, Moses, and Elijah
 - -  Jesus spent 3 days in the grave
 - -  Jonah spent 3 days in the great fish
 - -  Hell, Hades, and the Grave (...pit?)
 - -  Holy, Holy, Holy
 - -  Grace, Mercy, and Peace
 - -  3 wisemen
 - -  Gold, Frankincense, and Myrrh
 - -  Man, Woman, and Beasts
 - -  Matthew, Mark, and Luke (Synoptic Gospels)
 - -  Peter's three denials
 - -  Father, Mother, and Child(ren)
 - -  Lust, Sin, and Death
 - -  Knowledge, Understanding, and Wisdom
 - -  Light, Love, and Life
 - -  Satan, Lucifer, and The Devil
 - -  Son of the Father, Son of (the living) God, and Son of the Highest (Most High God)
 - -  Son of Abraham, Son of David, and Son of Joseph/Mary


** HAVE FUN!!! :-) **


P.S. Comment if you know of any more...