I did about 10-12 national commercials and then got one line parts in things like 'Curb Your Enthusiasm' and the show 'The Unit.' Got a little part in the movie 'Redbelt' by David Mamet and kept slowly grinding up and then started getting bigger parts in independents and getting noticed by Liz Meriw
The great book for you is the book that has the most to say to you at the moment when you are reading. I do not mean the book that is most instructive, but the book that feeds your spirit. And that depends on your age, your experience, your psychological and spiritual need.