Some quotes from Happiness is an inside job by John Powell. John assumes that happiness is a natural condition, and advocates the following practices:

Practice 1 We must accept ourselves as we are
Practice 2 We must accept full responsibility for our lives
Practice 3 We must try to fulfill our needs for relaxation, exercise, and nourishment
Practice 4 We must make our lives an act of love
Practice 5 We must stretch by stepping out of our comfort zones
Practice 6 We must learn to be “goodfinders”
Practice 7 We must seek growth, not perfection
Practice 8 We must learn to communicate effectively
Practice 9 We must learn to enjoy the good things of life
Practice 10 We must make prayer a part of our daily lives