That's because (at least in my case) starting something out of creative desire and finishing a project are stimulating different parts of the brain. First is th

That's because (at least in my case) starting something out of creative desire and finishing a project are stimulating different parts of the brain. First is that mind itch associated to problem solving, the second is the satisfaction of managing to walk the necessary path and do what had to be done. Those don't necessarily come together. What the average artists do is to follow their passion. Trying to "augment" that way into a more pragmatic one may lead to a loss of motivation. I've come to the conclusion that the best strategy is to tap into whatever gives me energy and let myself do as much as can be done "for free", then take that result and enter "the soldier mode" for the last part, which requires discipline. Ultimately, it boils down to considering the personal strengths and limitations when devising plans of actions, and pushing too many constraints for a first project may result in failure on exactly that planning.