This supplementary volume contains lectures that were long thought to be lost, in which Richard P. Feynman prepared his students for exams. With his unique humor and insights, Feynman revisits the essential fundamentals and offers valuable advice on how to approach and solve physical problems. The foreword by Matthew Sands, a colleague of Feynman at Caltech, provides a firsthand account of the creation and publication history of this perhaps most famous lecture series in physics. The tips are complemented by exercises from Robert Leighton and Rochus Vogt, specifically designed to supplement the Feynman lectures. For the first time, the revised New Millennium Edition includes three interviews with Richard Feynman, Robert Leighton, and Rochus Vogt.