Members of Qlikview said in their case study session that one of the most powerful things you can glean from analytics is finding the data you didn't know was relevant and were not looking for.  I felt the same way about the conference, I've picked up a lot of information that I wasn't expecting and have a punch list of new areas to research and become fluent in.  For example, the idea that we need to think about analytical data outside of the traditional rows and columns of a relational database and instead think about how to develop analytics from new repositories of unstructured content.  To hear industry leaders from Gartner, Teradata, Microsoft and Oracle all agree that in 5 years, the majority of analytic data we consume will come from unstructured sources is amazing given where we are today.  New concepts are evolving to help mine this data, and I know I need to spend more time learning about them to continue to be an effective practitioner.