Healing for most people requires a lot of energy use. You will need to have a clear mind free of any worries or problems that are going on in your life. You can use meditation or visual imagery to help you relax.
Breathing is always the best way to help you relax. Have a steady rhythmical breathing. On the inhale, imagine a pure white light coming into your body. On the exhale, visualize all negativity leaving your body. Send this negative energy into the ground so it can be neutralized.
Washing your hands and visualizing negative energy going down the drain helps. You can also use bells or chimes to help cleanse the auric field. Many other ways to clean an aura are burning incense, ask for protection and cleansing, rub Frankincense on your hands and wipe it around the auric field, and call for the Universal Energy to help you.