The Candid Frame - Freeman Patterson
Several years ago I bought and read several of the books written by Freeman Patterson and found them to be quite inspirational. They also helped me see what I was looking at, take labels away from what I was seeing and break things down into shapes.
I recommend reading any of his books, particularly those written as workshops in a book.
The latest Candid Frame episode by Ibarionex R. Perello features an interview with Freeman and is a recommended listen.