How we are to function in Christ.

Justification is the act by which God gets us out of sin (legally). Sanctification is the process by which God gets sin out of us (actually).[1]
"So then, my beloved, just as you have always obeyed, not as in my presence only, but now much more in my absence, work out your salvation with fear and trembling; for it is God who is at work in you, both to will and to work for His good pleasure." (Philippians 2:12-13)
Once we become believers in Christ God provides us with assets that allow us to function in Christ. The focus of our study will not be on those assets but instead on the function.
1. Faith: this allows us to utilize the assets provided to us.
2. Prayer: allows us to commutate with God and express our understanding of His will. It also allows us to become partakers in the work of other Christians that we may never meet.
3. Bible study: allows for our mind to be renewed.
4. Brotherly love: provides the basis for our interaction with fellow Christians.
These are not all of the areas that we function in, but only the basic ones. As we develop the basic functional areas God will guide us to the specific functional areas for us. An example of a specific functional area would be the spiritual gift that we receive at the moment of salvation.
For teaching on the assets provided to us at salvation I recommend the teaching on Salvation Grace Blessings as taught by Pastor Cliff Beveridge.

[1] Systematic Theology Volume Three, p 217, Dr. Norman Geisler.