I find that the following products help to volumize my hair. I have begun to use conditioner again after several years of not using it, and I find that it improves the hair's appearance noticeably.
Jason's Conditioner Jojoba Natural Balance 16oz
houseofnutrition.com
Jason's Shampoo Jojoba 16oz
houseofnutrition.com
Avalon Organics Therapeutic Shampoo, Volumizing Rosemary, drugstore.com
This is a volumizing shampoo that I often use.
Mineral salts for the bath