Review: Desiring God: 31 Prayers Seeking the Heart of God
Rating: 5 out of 5
Date: 07 14, 2013
This is a good book for reference.  God prefers that we speak to him from the heart and not memorize a bunch of prayers.  this book serves as great examples of good prayers.  You just have to learn to adapt them to what is going on in your daily life.