Consider maintaining a library of Third Age literature and inspiring magazine articles to lend your clients as recommended reading between visits.
These five books would be a good core selection:
Bernice Bratter and Helen Dennis, Project Renewment: The First Retirement Model for Career Women (Scribner, 2008)
William A. Sadler, Ph.D., The Third Age: Six Principles for Growth and Renewal After Forty (Perseus Publishing, 2001)
William A. Sadler, Ph.D., and James H. Krefft, Ph.D., Changing Course: Navigating Life After 50 (The Center for Third Age Leadership Press, 2008)