While this teaching was during miraculous times and demonic possession was literal, I believe that we deal with spiritual domination in more practical terms. I think our demonic opposition is one of mental invasion and control. The Devil cannot force his way into our lives, no matter what The Exorcist, and Rosemary's Baby says. He works through teaching, temptation, and torture to make havoc of our lives.
The Devil gets control of our lives when we buy into his thoughts, follow his mannerism or fear his wrath. Spinning heads is not demonic, two facedness is. Levitating is not demonic, low morality is. Speaking Latin in a crusty, spooky voice is not demonic, speaking gossip and slander is. It is a matter of godless behaviour resulting from godless thoughts and devilish beliefs.
The hope that we have is the Holy Spirit. When we obey the gospel of Jesus Christ, the Spirit fills our lives with the energy and vitality of a new life. As we embrace the Word of God and submit to the Spirit's direction, He fills our hearts and minds to the max. It's called the Indwelling and it puts a 'No Vacancy' sign on our hearts.
Let a devil see that going on in your heart and it will get on it's way.
"Do not get drunk on wine, which leads to debauchery. Instead, be filled with the Spirit. Speak to one another with psalms, hymns and spiritual songs. Sing and make music in your heart to the Lord, always giving thanks to God the Father for everything, in the name of our Lord Jesus Christ. Submit to one another out of reverence for Christ (Eph. 5:18-21, NIV)."