When give Ayurvedic massage it's important to tune into your own energy and life fore. In Ayurveda it's called prana. Prana, I've been told, is the space between the cells. It's a very subtle energy that comes from the ether element and is connecting to life force.
We understand in Ayurveda that doing massage is not just working on the physical body. There's an actual transfer of energy that happens between the practitioner and the recipient. So, as a practitioner, in order to prepare, there's preparation that's right before the session, but then there's preparation ongoing in your life.
Preparing by doing regular meditation, by taking care of your body and eating balanced foods, getting lots of rest. And living a healthy lifestyle, having yoga or tai chi or some kind of movement practice where you learn to balance your energy and take responsibility for your own health and healing on all different levels.
To prepare for Ayurvedic massage, keep yourself in check. Take care of yourself. Connect with your spirit. Learn how to come from your heart in your life. Your client, as a result, will thank you.