User X designer Joel Marsh published a blog post about the differences between sketching ideas with pencil, using computer software, and working solely in your head. He says the worst way is working it all though in your head because you are very limited in memory and database retrieval.
There are some new theories for conceptualist poets to chew on: new ways of thinking about the free agency of “I” where the author says,
“The same goes for all of us, almost all the time. We think we're smart; we're confident we won't be unconsciously swayed by the high list price of a house. We're wrong.”