Make sure that the environment in which you give Reiki treatments is warm, well aired and relaxing.
Ideally, use a massage table to give Reiki treatments but you could use a firm bed or a duvet placed on the floor.
Remove any jewellery you are wearing such as rings, bracelets and watch.
Always wash your hands immediately before and after each treatment.
Grounding exercises can be useful as a preparation for giving a Reiki treatment.
You could rub a few drops of rose oil or other oil of your choice on your hands before giving a treatment.
Try playing soothing music quietly in the background to help create a relaxing environment.
Sit quietly for a few minutes before your client arrives to clear your mind. You dould even give yourself Reiki to the heart and solar plexus areas.
~from Healing Reiki