I am a big fan of Seth Godin, his books and his blog. His books and blog are well-written, witty and full of creative business ideas. His blog entries rarely disappoint. I get a lot of great ideas particularly in the areas of marketing, customer service and communications.
I recently read Free Prize Inside! The Next Big Marketing Idea. You can tell how well I enjoyed a book by how much I underlined passages to gain new information or ideas. The pages are coated with yellow underlinings.
He offers great advice for a wide business audience including executives, entrepreneurs, doctors, inventors, marketers and college students.