Do you read materials from outside your industry or field?
Why outside? Put simply, the more widely read you are, the more likely to have a broader view of where your company fits into the world at large. Of how new technology, consumer trends or economic conditions elsewhere may affect the business. It allows you to be more strategic and I would suggest, more creative. Not to mention, a whole lot more interesting.
One of my favorite outlets for reading that expands my mind is Fast Company (magazine or online.) What do you like to read?