This seems to me to be a bit like saying "screw hammers, what you need are screwdrivers." There's a brilliant talk by John Cleese that floats around HN every 6 months or so on how to be creative; if you haven't seen it yet, and you're interested in such a topic, please please please watch it: http://vimeo.com/89936101 If you agree with Cleese's premise, I think it follows that what you need is motivation for the open…
One thing I could add though (not really related to creativity as such): when he talks about the time at the start of the creative time-space, where your mind gets flooded with the list of things that you should have done and forgotten about - I think this is actually one of the benefits of this exercise. I find it very helpful to write down all these things as a list, because trying to remember them is subconsciously a source of stress. Not to do anything about them then, but just writing them down to get them out of your head.
This is one of the real gems of understanding that I got from reading David Allen's "Getting Things Done". Having these things written down on a list frees your mind from having to try and remember them and also makes it much easier to go through the list and sort it in terms of importance or even get rid of some items altogether! For me it has definitely improved my productivity and also helped reduce the stress of forgetting to do things that are important because I got distracted doing something else.