I found these tips for a better massage in an article on massage and breast cancer which you can go read here if you like. They are appropriate for anyone who wants to receive a massage.
When getting a massage, consider this advice from the AMTA:
1. Communicate with your massage therapist. Give accurate health information and let the therapist know your expectations and reasons for the massage. Tell your massage therapist what you prefer in the way of lotions and oils and whether you have any allergies.
2. Remember to breathe normally. Breathing helps facilitate relaxation.
3. Drink extra water after your massage.
4. Don’t get up too quickly and do allow for some quiet time after your massage session. If you’re dizzy or light-headed after the massage, do not get off the table too fast.