There are countless examples of creative geniuses who insisted on a long walk every day.
Thomas Edison had some funky polyphasic/biphasic sleep patterns. I think he also did something similar to Salvador Dali, where he held a bowling ball between his legs and when it dropped it hit a pan.
Many creative geniuses, like Churchill, were depressive or manic/depressive, and when they were in a manic phase slept very little, if at all.
Of course, many creative geniuses have epilepsy, including Dostoyevsky, Poe, Tolstoy, DaVinci, Van Gough... the list goes on an on. Interestingly, some of those cited suffered seizures as the result of alcohol withdrawals (Poe).
I always enjoy the slight mania that large doses of Piracetam seem to produce for me. Unfortunately, it doesn't seem to do that to me anymore, no matter how much I take.