As a parish we will saying the Prayer to St. Michael at the end of each Mass.
References to St. Michael the Archangel can be found in the Book of Daniel in the Old Testament (Daniel 10:13 & 10:21). In 1994 Pope St. John Paul II asked the faithful not to forget the prayer to St. Michael to help in the battle against the forces of darkness in the world.
Prayer to St. Michael the Archangel
St. 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 you,
O Prince of the heavenly host,
by the divine power thrust into hell
Satan and all the other evil spirits
who wander through the world
seeking the ruin of souls.
Prayer to St. Michael is also found in the Missalette on Page 804.