The best way to become spiritually minded is, quite simply, to ask God!
If any of you lacks wisdom let him ask God, who gives generously to all without reproach, and it will be given Him.
This applies to wisdom about all things. When we struggle to be more like Christ, we need wisdom to get there. Rather than reading the latest book, watching the latest talk-show host, or even turning to a mature Christian for practical "how to's", God tells us in James to ask Him!
Then and only then will we be seeking the Holy Spirit to bring about lasting change in our lives.