Here are some useful links:
http://diocesanpriest.com/
The United States Conference of Catholic Bishops Vocations Page
The Council of Major Superiors of Women Religious
Free Monthly Vocation Download
Suggested Reading:
John Paul II on the Formation of Priests
John Paul II on the Consecrated Life
Story of a Soul by St. Therese of Lisieux
Confessions by St. Augustine
Personal Vocation: God Calls Everyone by Name by Germain Grisez and Russell Shaw
The Soul of the Apostolate by Dom Jean-Baptiste Chautard
The Priest is Not His Own by Archbishop Fulton J. Sheen
Treasure in Clay: the Autobiography of Fulton J. Sheen
Priests for the Third Millennium by Cardinal Timothy Dolan
A Priest Forever: the Life of Father Eugene Hamilton by Fr. Benedict J. Groeschel, CFR
When God Asks for an Undivided Heart by Father Apostoli
The Unchanging Heart of the Priesthood by Fr. Thomas Acklin, OSB
What Does God Want?: A Practical Guide to Making Decisions by Fr. Michael Scanlan, TOR
Divine Intimacy: Meditations on the Interior Life for Every Day of the Liturgical Year by Fr. Gabriel
Self Abandonment to Divine Providence by Jean Pierre de Caussade
Trustful Surrender to Divine Providence: The Secret to Peace and Happiness by Jean-Baptiste Saint-Jure and Saint Claude de la Colombiere
Searching for and Maintaining Peace: A Small Treatise on Peace of Heart by Fr. Jacques Philippe
About Being a Priest by Federico Suarez