Base it upon a Scripture verse if possible. Keep a Journal . Consider keeping a journal of Scriptures that touch you, impressions you have, your concerns, and new insights you learn about yourself, God, and His calling. Look for patterns of interest or concern. Keep Driving Toward the Vision .
Vision is a mental picture of a desirable future.
Eventually, God will give you a picture of what He wants you to do. This may be more or less clear. The key is to always keep driving toward the vision, even if you must drive slow because you are in a fog. Act in light of what you do know. Don't not act in light of what you don't know.