The constant struggle for the commercial artist is finding a balance between wearing a creative hat and wearing a business hat. Another struggle involves maintaining a high level of creativity for yourself, and encouraging that within your workplace. Here’s a list of suggested books to help with that:
http://creativity-online.com/news/whats-the-best-book-on-creativity-youve-ever-read/234040
Happy Artists 
I’m currently reading “Imagine”. Very similar in scope to “Where Good Ideas Come From”, but far better at investigating why the brain physiologically works the way it does. If you’re into books about creativity and creative insight, I second this one. Also available in audio format
Thanks for the info!