8. Have recourse to sacramentals
The appropriate use of sacramental can be very effective in battling against the Devil. These three sacramental are especially effective: the scapular of Our Lady of Mount Carmel, the Medal of St. Benedict and holy water.
9. Invoke St. Michael the Archangel
In our battle against Satan, we have to employ every weapon. God has chosen St. Michael the Archangel as a faithful angel, the Prince of the heavenly Host, to thrust into hell Lucifer and all the evil spirits. St. Michael, whose name means “Who is like God,” is as powerful today as in times past.