This site has some beautiful prayers to St. Joseph. A few are below. The second prayer, below, was written by Pope John XXIII.
Prayer to St. Joseph for Employment
Dear Saint Joseph, you were yourself once faced with the responsibility of providing the necessities of life for Jesus and Mary. Look down with fatherly compassion upon me in my anxiety over my present inability to support my family. Please help me to find gainful employment very soon, so that this heavy burden of concern will be lifted from my heart and that I am soon able to provide for those whom God has entrusted to my care. Help us to guard against bitterness and discouragement, so that we may emerge from this trial spiritually enriched and with even greater blessings from God. Amen.
Prayer to St. Joseph, as Patron of Workers
Blessed St. Joseph, patron of all working people, obtain for me the grace to labor in a spirit of penance for the atonement of my many sins. Help me to be conscientious in my work so that I may give as full a measure as I have received.
May I labor in a spirit of thankfulness and joy, ever mindful of all the gifts I have received from God that enable me to perform these tasks. Permit me to work in peace, patience, and moderation, keeping in mind the account I must one day give of time lost, talents unused, good omitted, and vanity of success, so fatal to the work of God. Glorious St. Joseph, may my labors be all for Jesus, all through Mary, and all after your holy example in life and in death. Amen.