Just read the book Drive: The Surprising Truth About What Motivates Us. It was a good book if you are a manager or own a business and are trying to figure out how to motivate your employees and improve your business performance. It sited several interesting studies and some demotivating statistics about how offering monetary rewards can actually decrease productivity.
The book had a bit too much theory and even after finishing it, I understood the problem, but didn't comprehend what was to be done to solve the problem. It seemed like some of the ideas would work for highly skilled jobs, but not for industries with lower level work where I think most managers would admit to having most of the issues with how to motive their employees. One example of this was the call center for zappos.com offers 1 week training and then $2000 to anyone who doesn't want the job after their training is complete. Well, my co-worker and I both agreed we would take the $2000 and run. But according to the book, they have one of the highest rated customer satisfaction call centers and almost no turn-over. Regardless it was an interesting read.