Self-control is a fruit of Spirit. God says in Proverb 25:28, "Like a city whose walls are broken down is a man who lacks self-control." We will be useless if we don't control our mind. God works for those of who wait for the Lord. Lack of control is mainly coming from selfishness. Moreover, if God doesn't work in our life, we tend to fail.
When we say about mind control, it means controlling our mind in Spirit. And God is peace.
Based on this, I am praying that God will drive me every moment: in working, talking, serving, even in sleep. I want to be a God-driven man. It works sometimes. But in many times, I need to control my mind. I still have selfish part in me (old being). God says in 2 Corinthian 5:17.
"Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come!"
Praise the Lord!