 What's the best first business book for a programmer?
Paton: What kind of business are you interested in?If internet/tech... read TechCrunch and Mashable.
Watch "This Week in Startups" by Jason Calacanis.Watch some picthes from TC50. (Click the logos to see their pitch): http://www.techcrunch50.com/2009/Business Week and Money magazines are decent, but less tech related.That said, you'll still learn the most by experience.  That is, trying things, making mistakes, and learning from them.  There is a learning curve involved, but if you have the determination you'll be fine.Good Luck