How to Pray

Christian prayers are very varied. They can be completely spontaneous, or read entirely from a text, like the Anglican Book of Common Prayer. Probably the most common and universal prayer among Christians is the Lord's Prayer which is how Jesus taught his disciples to pray.

Christians pray to God (without specifying a person of the Trinity); or to the Father, the Son or the Holy Spirit (or some combination of them). Some Christians (e.g., Catholics, Orthodox) will also ask the righteous in heaven and "in Christ," such as Virgin Mary or other saints to intercede by praying on their behalf (intercession of saints). Other formulaic closures include "through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever," and "in the name of the Father, and the Son, and the Holy Spirit."

It is customary among Protestants to end prayers with "In Jesus' Name, Amen" or "In the name of Christ, Amen" However, the most commonly used closure in Christianity is simply "Amen" (from a Hebrew adverb used as a statement of affirmation or agreement, usually translated as ‘so be it’).

There is also the form of prayer called hesychast which is a repetitious type of prayer for the purpose of meditation. In the Western or Latin Rite of Catholic Church, probably the most common is the Rosary; In the Eastern Church (the Eastern rites of the Catholic Church and Orthodox Church), the Jesus Prayer.

Guide to Prayer

This description of prayer was taken from  http://en.wikipedia.org/wiki/Prayer#Christianity