Last night I had some trouble sleeping, so I decided to get up and read. What I read was the first article on prayer in The Catechism of the Catholic Church.
This article used examples from the Old Testament to show that prayer is not just a conversation with God, but an awareness of living in His presence. It was a marvelous revelation to me! I have so often chastised myself for spending ten minutes in conversation with Him, as if that was the limit of our relationship. But prayer is when I tell Him I can't sleep and He sends me to read. Prayer is when I reflect on what He would have me understand. Prayer is sharing that with an awareness that He is right here with me, not off in some distance doing important God things, but hanging out here with His daughter, doing Father things like helping me draw to Him so I can rest.
Which seems to me to mean that prayer isn't something I do, but a continued relationship with the Father.