You could do worse...

As I've mentioned before, a lot of my game design insight comes from my graphic design / marketing background. Marketing and games are ultimately about the same thing: Interpreting the needs of your target audience. It's all about people, and as my girlfriend would say, "people are squishy." What else is about people... business?

So, to that end, I'd like to point out a few things that I'm particularly fond of, not from a gaming standpoint, but from marketing, graphic/web design, and business

1. Monday Morning Memo - Interesting insight into business and humanity every Monday. Free.
2. The Wizard of Ads Trilogy - Pretty much the MMM, but 3 books full. At $27 for 3 books, I'm thinking I might start leaving these as a gift for graphic design consulting jobs. Read one a day and reflect on 'em, it's juice for the brain.
3. Call To Action - "Secret Formulas to Improve Online Results" sounds like the subject of a spam email, but it's really quite useful, reinforcing a similarity between web and games: there are people that have to use what you're designing. A good read, and particularly so  for those working on web-based games and projects.

You could do worse than reading this stuff... even if it's not specifically for game design.