Steps to Discernment
"Get A Spiritual Director - Ask a priest to meet with you once a month for 30 to 60 minutes for confession and to discuss your spiritual life. Tell him you're considering priesthood.
"Pray Every Day - Develop a daily prayer routine with your spiritual director. Pray for God to give you not only knowledge of what He wants you to do but the courage to do it.
"Serve Your Parish - Seek opportunities to get involved in parish life. Choose one parish and register - don't float from parish to parish. "
from the Vocations page of the Archdiocese of Washington