You've accumulated a lifetime of real-world work experience and general life experiences. Why not share your expertise with the world by becoming a teacher? A part-time teaching job or instructor position could help you bring in a steady paycheck during your golden years or amid a period of semi-retirement. Teaching is also a great way to keep your mind stimulated and help you connect with others. By contributing to young people's development, you'll make a difference in the world beyond your own life. You may not get rich teaching part-time; but you will enjoy a richer life.