Spiritual Direction can help you discern God's calling on your life. When you meet with your Spiritual Director (counselor), you will at some point in your sessions begin to talk about the deep desires of your heart. Your calling is in some way tied to those deep desires. Notice I said deep desires which are not the same as those superficial desires that come and go. Deep desires have often been with us since our childhood. Sadly enough, a lot of us have given up or walked away from those desires for various reasons that range from poor choices, poor self worth, and or poor stewardship of our God given gifts and talents.
A Spiritual Director might guide and challenge you to dust off those deep longings and help you to give expression to those longings, S/he will then, by the leading of the Holy Spirit gently walk you through a process of discernment that will allow you to begin to take baby steps in the direction in which God has been calling you since before the foundations of this world.
I leave you with Jeremiah 1:5 - The Message Translation.
Before I shaped you in the womb,
I knew all about you.
Before you saw the light of day,
I had holy plans for you:
A prophet to the nations--
that’s what I had in mind for you.”