I have discovered different "people" on my own internal committee.
I have one who loves to create, to make big vision, and to wonder about it all. That's the person who wanders into a bookstore and starts to pick up books on Quantum Physics...just for fun!
Then, there's another part that just LOVES to check little boxes of completed actions! Enjoys seeing completion, completion, completion.
I've run into small "speed bumps" in my own productivity, however, when I've tried to call on both parts of me at the same time. So, I built in automated ways to manage my energy, thought and action... My own Getting Things Done.
Perhaps the most important lesson I ever learned is to start off by ALWAYS writing things down as soon as I am aware of them. This has meant, in the past, that I'll stop in the middle of a conversation, dinner, phone call or even while delivering a seminar!, and write something down. (The *form* may change, as sometimes I collect the vision into my own voice mail machine at the office.)
Then, I let the Next Action piece come in. Picking up that piece of paper or message, I ask, "What's the next action?"
This process, mixing vision with action, has allowed me to get a LOT of things done, with a sense of relaxed control.