I've noticed that when I'm busy I tend to get the most stuff done - that is, busy with work, somehow, results in lots of non-work creative and inteelektual meanderings accomplished. To wit: while working on Rhyme Animal, I read:
Collected Short Stories of Pushkin
"Anansi Boys", Neil Gaiman
Re-read "Jonathan Strange and Mr. Norrell", Susanna Clarke
"Ladies of Grace Adieu", Susanna Clarke
"American Gods", Neil Gaiman
"Good Omens", Nail Gaiman & Terry Pratchett
"Foundation", Isaac Asimov
"Rising Tide", John Barry
"Water for Gotham", Gerard T. Koeppel
I know there are at least a couple of others I'm forgetting at the moment. It's no spectacular truism, but it does point to the fact that an agile mind depends on keeping it well fed...and don't worry, the queue of books waiting for attention is a bit broader than the previous list, so the diet is properly balanced.
I could use a good, interesting history book right now actually.