When people hear I am in the idea business, they often tell me their 'million dollar idea.' You know, the one that will make them a cool million.
I think its good to have huge, game-changing, new to the world ideas. But, one million dollar idea isn't enough. Your idea may be un-workable due to current technology or already in process by a major corporation or...well anything. Instead I recommend to them (and you) to have lots of big ideas. Have so many that you can't get to all of them, so many that you run out of space. Then you'll be forced to work on the ones that are most profitable, quickest or fun. (A good metric, by the way.)