Let me mention some more specifics. There are skills you can use to help trigger this that goes beyond the specific suggestions in that linked article. Specifi

Let me mention some more specifics. There are skills you can use to help trigger this that goes beyond the specific suggestions in that linked article. Specifically, you train yourself to increase the amount of alpha-band and theta-band activity in your brain. Theta-band is where you start getting creative; alpha-band allows your working consciousness (the one you use to read these words) to visualize/verbalize it in a form that you can understand and remember. The book I sourced this from and use is Anne Wise's High Performance Mind. Note that I didn't really see any double-blind papers cited in there. I can only offer anecdoptal evidence that the techniques in there works for me. YMMV.