When asked how he simultaneously maintained a law practice; made groundbreaking discoveries in Proto-Indo-European linguistics; maintained fluency in 41 languages; translated many of the major works of Sanskrit literature into English for the first time; and wrote treatises on law, history, botany, poetry, geography, astronomy, and music, Sir William Jones replied: "A change in labour is a species of repose."
Not that it really matters, but it is useful to look at the situation in both lights. There have certainly been situations where I stopped procrastinating on one task because a newer, more unpleasant task presented itself. "Boy, I bet I should clean my room instead of deal with these taxes!"