Let us define spirit as that which determines the desires, emotions, and motivations of the mind. From this standpoint, we can see that if a portion of our identity can indeed be recognized as spirit, then working to maintain and promote it, with catalyst of mind and body moving hand in hand, then we can transform our entire being through spiritual maintenance.
It is not something that you can put a formula on for everybody, but you will need to figure out what formula you are already using to guide you, and work on that.
Since it could become controversial or jarring if say anything too hastily here, I will recommend a few great videos to start with, to help you understand the proveable nature of your spiritual identity.
Princeton Engineering Anomalies Research
Rupert Sheldrake – Morphogenetic Universe