The devil feeds on sin. Starve him.
Put on the whole armour of God.
Pray.
Pray for yourself
Pray for your neighbour
Pray for your family
Pray for the church of Christ
Pray for your friends and colleagues
Pray for the government
Pray for those in need
Pray for those who are mourning
Pray for the lost
Pray for the prisoners
Pray for the hurting
Pray for the hearts of kings
Pray for the salvation of men/women/boys/girls
Pray for your enemies
Pray for all.
Have faith in God.
Pray without ceasing.