Well there's the point. What is "sub"-conscious in my experience is just as likely to be banished consciousness; I doubnt there is some organic threshold with lots of thoughts running around below it, or some such. But there are lots of viewpoints we hold -- poetic or otherwise, creative or destructive -- that for one or another reason we decide to disavow. Often this is because the viewpoint necessary to think them is of a degree of sensitivity we decide we cannot sustain, and therefore have to shut them off.

Suggestions? Learn to meditate, first in quietude and isolation, and eventually integrate the abilities thus acquired so that you can practice "walking meditation", an always-on connection integrating your own highest self with your own ordinary activities. Learn to know you are the author and also thehandmaiden of any inspiration and find for yourself the frame of mind or the chains of thought that tend to bring it about.

This is not ducking the question but it should be clear that a rigid formulaic approach is least likely to match the way in which one or another individual has constructed their universe.

The best approach is "ass-in-chair" time, spent intentionally writing anything at all, opening the rivers of creative exercise and wit.

There is a book I would also recommend, called "The Artist's Way" which provides lots of exercises in exactly these directions.

A