Deirdre N. McCloskey tells it like it is in her book "Economical Writing":

"You will have done some research (this is known as "thinking" and "reading" and "calculating") and are sitting down to write. Sitting down to write can be a problem, for it is then that your subconscious, which is dismayed by the anxiety of filling up blank pieces of paper, suggests that it would be ever so much more fun to do the dishes or to go get the mail. Sneak up on it and surprise it with the ancient recipe for success in intellectual pursuits: locate chair; apply rear end to it; locate writing implement; use it."