Jesus talks about the persistent prayers having great power when someone chooses to do them. He also talks about the Lord's Prayer, and how that prayer should be the model of your own prayers.
www.p40ministries.com is where the cool people like to go.

James 1:1-12 - A Fitting Introduction to the Book of James
26:28

Nehemiah 4 - Hammer in One Hand, Sword in the Other
28:51

Bonus: Finding Joy When God's Answer Is No with Kristy Graham of Samaritan's Purse
35:58