Actually, you don't need to choose a job that's "perfect for you." But you do need to be productive in ways that honor God in your work life.
Here's a better question: As a believer, how can I determine what I am supposed to do, and then do it well? The doctrine of calling, or vocation, will lead you to the answer.
Finding My Vocation will help you do three things:
God placed us in his world to work for his glory. You might not know exactly what he has planned for you, but you must-and can-be faithful where he calls you.