Well, I get up every day at the crack of noon, and I don’t even think until after coffee. Habit alone directs my survival until One o’clock.
Creativity seems to begin most often after the sun goes down, more often later in the evening. Once it does, monomania sets in. I can’t seem to let go of something until I get the central idea completed. Two or three days straight is as likely as an overnighter.
Really big projects, like whole programs from scratch or an elaborate visual/plastic arts design generally mean the loss of all but exhausted sleep, minimal sustenance, and medically essential hygiene. I just can’t stop.
Songs, and poems are blessedly less intrusive, and simply leave me distracted, but able to function in society for a day or two, as I mumble lyrics under my breath, and sing out loud whenever I believe I am alone. The process is a nagging impediment to anything I do, though, until it is finished, and delivered to the object/subject/inspiration. After that, I seldom recall the silly things, and must rely on the recipients to keep a copy. I seem to be a very process oriented artist.
For this reason, as much as any other, I have always avoided becoming involved in creative work, professionally. That would kill me, if it were a regular part of my job.