How do I pray? 

This question just doesn't have one answer.  There are so many ways to pray some of which include being a part of an organized religion, meditation, bible study and going out into nature and thanking God for all of what he has created.  There are roughly 40 different organized religions in the world today. 

Webster's New World Dictionary (Third College Edition) defines religion as:"any specific system of belief and worship, often involving a code of ethics and a philosophy."

Within organized religions, there are rituals.  Some receive holy communion or "Christs body and blood" as well as tithing which means to give a percentage of your annual earnings to a church and the clergy.  Some practice certain gestures like kneeling, the sign of peace, genuflecting, singing and praising.  More extreme gestures may include "spiritual cleansing and healing" performed by the minister.  Millions of people are members of one form of organized religion.  The community, rituals and doctrine of these religions are very comforting to people.  

Some alternatives to belonging to an organized religion would include daily meditations, affirmations and/or prayer.  Living a life of faith in a higher power, giving thanks and being a generous and kind person are spiritual alternatives as well.  Some choose to donate to charitable causes rather than to tithe to a church.  Some believe that God did not specify one "true" religion and instead wants us to have a relationship with him how each of us see fit.

Still others believe that there is no God or higher power.  This belief is called atheism which means "the theory or belief that God does not exist".  To be agnostic means "a person who believes that nothing is known or can be known of the existence or nature of God or anything beyond material phenomena; a person who claims neither faith nor disbelief in God.

If you choose to have faith then any method that you use to give thanks can be considered prayer.  Now that  you know some different outlets you won't have to ask how do I pray?