Duane Sheriff teaches that the name of Jesus is the most powerful name under heaven. Effective prayer is not just about repeating Jesus' name but understanding and embracing the authority that comes with it. To pray effectively, we need to align our requests with God's will and use the powerful name of Jesus. This approach to prayer requires a personal relationship with Jesus, ensuring that our requests are in harmony with God's desires and plans. Duane encourages believers to approach prayer with faith, gratitude, and a heart aligned with Jesus' teachings, highlighting that effective prayer stems from a genuine connection with Jesus rather than the mechanical use of His name.