God calls everyone to His service, but understanding the precise nature of His call to you requires sustained thought and prayer, as well as an open heart. The vocation director in your home diocese or religious community is your primary resource for finding the right path. Here are a few online resources that can help: 

• Discernment Tools from the U.S. Conference of Catholic Bishops
• Vocation.com offers a library of resources as well as the opportunity to address questions directly to a priest
• Paths of Love, a website dedicated to discussion of vocation to states of life in the Catholic tradition, including a bibliography and a Catholic Vocations Search Engine
• Vision Catholic religious vocation network.