First of all, in order to live a victorious Christian life, you need, (obviously) to have a Christian life! I mean, how is your relationship with Jesus? I am not talking about any denomination. If you go to a Bible-believing church, that is O.k., but I am not talking about that right now. If you have ever received Jesus Christ as your personal Lord and Saviour, you know what I am talking about. You know that God has given you eternal life, and that Jesus Christ paid for you on the cross. And also you know that you are much better now than before, when you walked without God in your life.
But, anyway, are you letting JESUS to be the Lord of all areas? You just obey God in order to gain heaven, or to avoid hell, OR, have you come to a point were you do God's Will because you love Him, and that what He says is what is better?
Think about it, pray to God to give you insight on these issues. (read Eph. cap. 1)