Powerful prayer that works, Bible prayer, begins with worship. The most precious thing you can give God is worship. Worship is adoration, veneration, and thankfulness. Praise is an act of worship. Scripture has much to say about praise.
Healing prayer for the sick that works starts with knowing the will of God. He says, "I am the God that healeth thee" (Exodus 15:26). Jesus is no respecter of persons. If he ever healed anyone (and he has), he will heal you too. God knows what you need. He said, "If thou can believe, all things are possible to him that believeth" (Mark 9:23).