Praying Scripture brings a burst of unction on a person's prayer life. Martin Luther called Scripture the lighter that warms up the heart for prayer. While it's easy to pick up Scripture and pray away, it's also helpful to use books that have verses organized and ready for specific times of prayer.
I just found this book, "Take Words with You" over the weekend, and it's already been helpful to pray the promises of God. It's from Tim Kerr, a pastor in Toronto, and he writes:
Many years ago I discovered a precious truth regarding prayer: God loves to hear his own words prayed back to him! . . . It is hoped that the many promises of God written here will be prayed back to God in prayer as we seek to enter into God's purposes accomplished for us through Christ's cross. Sometimes we remember the gist of a promise but cannot remember what was said or where it is found in Scripture. This manual has been written to make that process easier by organizing the promises of God by categories and themes.
You can go to Tim Challies' blog and click the download button at the bottom of his post to get the book.
Here's the table of contents:
1 Prayer Begins with God
2 The Fuel of Intercession (#1): God’s Promises
Promises On The Amazing Rewards of Redemption
Promises on the Rewards of Redemption: Toward Specific Needs
Promises on the Rewards of Redemption: For The Godly
3 The Fuel of Intercession (#2): Scripture Prayers
4 Scripture: Faith Affirmations