Bring a product vision to your project: Design the Box
"One practice that I've found effective in getting teams to think about a product vision is the Design-the-Box exercise ... The team makes the assumption that the product will be sold in a shrink-wrapped box, and their task is to design the product box front and back. This involves coming up with a product name, a graphic, three to four key bullet points on the front to "sell" the product, a detailed feature description on the back, and operating requirements."