In the 1940's, a devout Japenese Buddhist, Ishin Yoshimoto, developed a method of mediation and self reflection called Naikan, which means "looking inside".  Through intense introspection, practictioners strive to develop a natural and profound sense of gratitude for blessing bestowed upon them by others - blessings that may otherwise go unnoticed.  The following exercise, to be done daily before bedtime, is from Naikan: Gratitude, Grace and the Japanese Art of Self-Reflection [Stone Bridge Press] by Gregg Krech, executive director of the ToDo Institute, a Naikan education and retreat center in Vermont.

Make a list in response to each of these three questions:
1) What did I receive from others today?
2) What did I give to others today?
3)What troubles and difficulties did I cause others today?

At the end of the week, review your lists and write a thank you note to one person for something specific he or she did for you or gave to you.