There are many versions of the Novena to Saint Jude. Here is the one that I have used.
“St. Jude, glorious apostle, faithful servant and friend of Jesus, the name of the person (who betrayed our Lord) has caused you to be forgotten by many, but the true Church invokes you universally as the Patron of things despaired of. Pray for me, who is so miserable; pray for me, that I may finally receive the consolations and the succour of Heaven in all my necessities, tribulations, and sufferings, particularly (ADD YOUR PERSONAL REQUEST HERE), and that I may bless God with the Elect Throughout Eternity.
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.
I promise, O blessed St. Jude, to be ever mindful of this great favor, to always honor you as my special and powerful patron, and to gratefully encourage devotion to you by publishing this request. Amen.”
Say 3 Our Fathers, 3 Hail Marys, and 3 Glory Be’s. I repeat these prayers nine times.
Do this for 9 days in a row.