in regard to the 'essay writing' technique for creating songs, when i was at university & had to prepare assignments, one of the ways i would do it was to write out the bibliography first.doing this seemed to have the effect of 'cueing/ prompting' ideas for the body of the work.
in some respects, i've used a similar method for songs, that is; i hear a song or conversation or read something & quickly make a note of the idea before i forget it.
having the use of a pc's been a great advantage too, except i've had 'writer's block' for over 6 months now- but i've got a couple of dozen half done creations on file- some only as far as the title.
more comments?