Angel of God, My Guardian Dear
to whom God's love commits me here. 
Ever this day be at my side
to light and guard and rule and guide. 
From the pain of sin please keep me free. 
At the our of my death my helper be. 
Amen

Saint Michael the Archangel,
defend us in battle.
Be our protection against the wickedness and snares of the devil.
May God rebuke him, we humbly pray;
and do Thou, O Prince of the Heavenly Host -
by the Divine Power of God -
cast into hell, satan and all the evil spirits,
who roam throughout the world seeking the ruin of souls.
Amen

Michael Michael of the morning
Fresh chord of dawn adorning
Keep me safe today
And in time of temptation
Drive the devil away.
Amen

Here's a real nice letter written to his Mom by a young Marine during the Korean War concerning the above St. Michael prayer.  If you believe that the angels are sent to help us here on earth then you will love this story titled St. Michael and Michael’s Story

Blessed Saint Gabriel, Archangel We beseech you to intercede for us at the throne of divine mercy: As you announced the mystery of the Incarnation to Mary, so through your prayers may we receive strength of faith and courage of spirit, and thus find favor with God and redemption through Christ Our Lord. May we sing the praise of God our Savior with the angels and saints in heaven forever and ever.
Amen

O God,
who from among all your angels
chose the Archangel Gabriel
to announce the mystery of the Incarnation,
mercifully grant that we
who solemnly remember him on earth
may feel the benefit of his patronage in heaven,
who lives and reigns for ever and ever.
Amen

Prayer for Healing
Glorious Archangel St. Raphael, great prince of the heavenly court, you are illustrious for your gifts of wisdom and grace. You are a guide of those who journey by land or sea or air, consoler of the afflicted, and refuge of sinners.
I beg you, assist me in all my needs and in all the sufferings of this life, as once you helped the young Tobias on his travels. Because you are the "medicine of God" I humbly pray you to heal the many infirmities of my soul and the ills that afflict my body. I especially ask of you the favor (here mention your special intention), and the great grace of purity to prepare me to be the temple of the Holy Spirit.
Amen.

Prayer Before a Trip
Dear St. Raphael, your lovely name means "God heals." The Lord sent you to young Tobias to guide him throughout a long journey. Upon his return you taught him how to cure his father's blindness. How natural, therefore, for Christians to pray for your powerful help for safe travel and a happy return. This is what we ask for ourselves as well as for all who are far from home.
Amen

The Archangel Raphael is from the book of Tobias in the Catholic Bible. It is one of the books that Protestants call Apocrypha. Since these books were found in the Dead Sea Scrolls at Qumran in 1947 there has been more attention drawn to them. I guess that is why the Apocrypha are now included in this online version of the King James Bible.  It is called the book of Tobit there.

God bless
Mike