One of the things I enjoy most about vacation is taking some time to read. It's nice to think about new ideas and just let your brain roam free latching on to whatever you want. One of the books I read was REWORK by 37 Signals. They're the guys who run BaseCamp & Highrise CRM. They put out some revolutionary ideas on their blog and one of the founders made a phenomenal TED Talk about time wasted at work.
They talk a lot about bad business practices and how they do everything backwards and how it works out really well for them.