As an individual person one can conquer Satan by faith and prayer. On a global scale, we cannot conquer Satan because he plays a large part in fulfilling many end-time prophecies. So in this respect, Satan is needed to bring about Armegeddon and the second coming of Christ.
By stop believing in him.
I heard that dismembering an enemy usually stops them
I got some good news, there is no Satan so you can do something interesting in stead.
The problem is our source, your reading from a book of fiction, mythology, none of that is real or refers to actual persons.
Give him the silent treatment!
Insult him on the internet.
Sacrifice Ted Nugent on a flaming pile of horse manure?
Today ? You're not half in a rush are you ? Patience is a virtue. :-)
By staying close to God and resisting temptation.