What Would David Do? 
Examples from the life of David and the Book of Psalms.
http://members.aol.com/rdbrem/Bible Study Series on Prayer
Threaded Bible Studies on the Lord's example prayer, the prayer of faith vs. Thy will be done, praying in the Spirit, posture, persistence, and other meditations with a view to encourage Christians to pray.
http://www.acts17-11.com/prayer.html
How to Pray
A guide drawing lessons and examples from Bible verses.
http://www.biblestudygames.com/biblestudies/howtopray.htm
Teaching Pages: Unanswered Prayer
Provides insight into why prayers seem to go unanswered with verses and instruction on praying.
http://www.teachingpages.co.uk/topicPresentation.php?articleUnansweredPrayerPart1
