On the beautiful St. Michael prayer card that a friend recently gave to me it says, "We should make it a sacred duty to join fervently in this important prayer, repeating if often each day."
Both Pope John Paul II and Pope Benedict have suggested that Catholics recite the prayer of St. Michael daily and especially after Mass. Up until 1965, it was recited at Mass. I say bring it back. It can only help people of faith.
In my opinion, anyone who doesn't believe in evil or evil influences has a veil over their eyes and mind. Everytime I watch the news or read a newspaper, there's evidence of evil in the world. It's very plain to me.
Prayer to St. Michael the Archangel
Saint Michael the Archangel defend us in battle. Be our safeguard against the wiles and wickedness of the devil. Restrain him, O God, we humbly pray and do thou, O Prince of the heavenly Host, by the power of God, cast into hell, Satan and all the evil spirits, who prowl about the world seeking the ruin and destruction of souls. Amen.