Dr. D.T. Foster discusses his book "The Stress Book," which offers 40 ways to manage stress. Inspired by the pandemic, the book addresses stress as a universal experience, categorizing it into acute, chronic, eustress, and distress. Foster explains that stress can be caused by various factors, including financial pressures and personal relationships. The book provides strategies for stress management, including identifying stressors, budgeting, self-acceptance, and seeking professional help. Foster emphasizes the importance of living within one's means and maintaining realistic expectations to reduce stress effectively.