The way we think is just as important as the way we act. We don't usually think about this when we get the results we want out of our actions. Choosing to think differently can have a real impact on the way we live our lives. Paul the apostle was not shy in talking about the way we think.
There is a major difference between the Spirit-led mind-set and the mind-set of the flesh. This difference comes because, well, the flesh does not always want the same things for our lives that God's Spirit wants. God can see the entire chessboard, and ultimately places the pieces on the board in the strategic location that is best. We can only see a limited part of the chessboard and have a tendency to try out our own plans instead of trusting the Chess-master.
Whereas the mindset of the flesh ultimately tears us down, the Spirit-led mind-set ultimately builds us up and brings us closer to God. The mind-set we have can have a godly effect on our lives, or it could be the beginning of our self-destruction. Which effect it has depends on the mind-set we have, and the mind-set depends on who (or Who) is in charge of our lives.
If we really want to change the way we think, there is no better place to start than prayer and meditation on God's word. Set aside a time to talk to Him and to listen for Him to talk back. Seek Him, and as you follow Him you will find that your way of thinking changes. The more you pursue Him, the more radically your mind-set will change. This change is ultimately for our good and God's glory!