My favorite is the Novena to St. Jude, patron of hopeless and lost causes. My grandmother was very devoted to St. Jude.
May the Sacred Heart of Jesus be Adored, Glorified, Loved & Preserved throughout the world, now & forever. Sacred Heart of Jesus, please pray for me. Saint Jude, Worker of Miracles, please pray for me. Saint Jude, Helper of the Hopeless, please pray for me. Amen.