I would also like to add to the above posts that you need to be sure to check your state and local laws regarding this type of healing work, too. In some states, simply touching someone with your hands is considered "massage" (whether it is or isn't) and unless you have a massage therapy license (and the proper schooling), they can arrest you if you're charging for the healing. In others, I've heard they'll slap you with a "practicing medicine without a license" charge for your efforts.

Working for free "frees" you in many ways, not the least of which is the joy of "freely" sharing your healing gifts.