I'll make this brief,

Get into a relaxed position.
If you are performing on a different person, try massaging to get rid of the shields they naturally have up. Plus who doesn't like a massage?
Take out a healing object if you use one, such as a talisman or necklace.
Picture white energy emiting from your hands or the object.
See it sweeping through the body getting rid of impuritees*
"see" the impurites as black wisp now channeling into the earth.
Thank the earth for aiding in the healing.

*if you are healing a certain place, make sure to focus on that spot.