When you wake up, what's the first thing you think about? What's the last thing you think about before you fall asleep? Are they the same?
When something wakes me up, I'm usually disoriented for a couple minutes, especially if I was dreaming (and I dream a lot). I've had lots of dreams involving my cell phone's ring tone (a midi version of the Queen of Night's aria). On a typical morning, my initial thoughts are along the lines of, "Ugh, that's my alarm again. How many times have I hit the snooze button? Oh, I should probably get up now. Crap, I wanna go back to sleep. Oh, hi Galahad. Hi, Yarmulke and Bouncer. Ok, time to sit up and roll out of bed."
Clearly, I hate weekday mornings. And any other mornings that don't involve sleeping in and drifting awake naturally. I'm in zombie mode for an hour or so after waking up.
At night, however, I tend to crawl into bed, say goodnight to the kitties, lay down, and pet anyone that demands snorgling (usually Galahad... he's the biggest snuggler of the three). Then I close my eyes and visualize scenes in my head, almost always involving my story characters. The scenes don't usually have much to do with the stories I write, they just play through my mind as self-entertainment. Sometimes there will be epic plots that I continue night after night (since I usually fall asleep at some point during this... I usually know when I'm about to fall asleep, since the scenes will fade into randomness as my unconscious mind takes over, and then I'll sort of "pause" there until the next night). They're usually fairly ridiculous, like cheesy sitcoms, so I don't usually write them down. They rarely influence my dreams, though I'll occasionally dream about my characters. I've been having nightly visualizations for roughly 20 years, it's just something I like to do.