I'm at the Imagine Cup Finals, and I'm getting to see lots of students' projects, and lots of ideas. For competitions like that, there are of course a set of objectives that are slated as part of the competition -- work toward those goals and do better than everyone else. Sure, the Imagine Cup's goals are broad -- "Make the world a better place" -- but they're still a set of "mission objectives."
Real life does not have such easy, slated goals.
Let's say I wanted to start a startup tomorrow, with several ideas. How would I choose between them for general applicability to the masses?
(There's lots out there on how to take an idea and sell it, but I'm trying to choose the idea based on sell-ability)