bhenry: Aromatherapy scents are everywhere but a good place to look is a health food store. A good basic book on the subject helps if you're starting out. Book stores are full of them. Be careful, some of the scents, like Chamomile, can be very expensive.

Rythmic breathing: Get an audio tape on the subject. Books are OK but you're kind of in the dark about the fine details. Some good tapes: Healthy Breathing by Ken Cohen and Conscious Breathing by Gay Hendricks, Ph.D. The books can come later.