Truly creative people, the kind who are successful enough to get asked how they do it, are generally too steeped in creative impulses to realize the level of magic involved; they are fish trying to think about water, or humans trying to think about air (which can be done, obviously, but it took genius to do it the first time).
Non-creative people just shrug and go about their business. The rest of us, the unhappy fragment who have been hit by lightning just often enough to know that it is real, that we want more, and that we will probably only ever get enough to keep us hungry, are the ones who spend time and effort worrying about what creativity is and how to get it.
My own experience with creativity and time management is that, if you are able to procrastinate, you should, because the story or poem will force itself out of your fingertips when IT is ready. Sitting down at the keyboard and trying to force the issue produces suicide-inducing drek. But then I am not a COMMERCIAL writer, and have long since given up hope of becoming one.