One of my favorite sites is the American Film Institute’s web page. There’s a wealth of information in a number of different forms.
Checking out the video page is a good place to start. Here you can find Alfred Hitchcock discussing Mastering Cinematic Tension, Cinematographer Janusz Kaminski discussing working with director Steven Spielberg, Gary Ross discussing writing the screenplay and much, much more. One of the great strengths of the site is that there are so many film professionals working in so many different roles who discuss both their individual professional skills and their personal love of film as a means of expression.
