Current Schedule: Core Sleep: 10pm-1am Naps: 6:00-6:20am, 11:20-11:40am, 5:40-6pm.
I had a little snafu this morning. Everything seemed to be going along well enough, and around 3am I went to the couch to get some studying done, although I was feeling some tiredness creep in. Although I didn't lie down on the couch or anything, I dozed in and out of sleep for a bit. Finally, I got up and went to bed for my first nap.
From this, I learned some things. One, if you're feeling sleepy/tired, do something to wake yourself up now - don't expect yourself to magically get more awake over time. While that can happen, you shouldn't bank on it. In my case, I was going to shave and get a shower, but was trying to wait until around 4am, since 4-6am is when historically I'm at greatest risk for falling asleep out of schedule. However, by withholding those activities to wake me, as it was only 3am, I wound up drifting in and out of sleep until 5am and essentially sleeping out of schedule anyway. In short, don't try to fit your tiredness into a predefined schedule. While you should have a plan in general, if you're tired now, do something now to wake yourself up, lest you fall back asleep.
Otherwise, the day went well - work was great, naps were on schedule, etc. My 2nd nap was a bit lighter, but I wouldn't be surprised if that was because my body had acquired some useful sleep during the dozing-off period and thus didn't need the 2nd nap rest as much as usual.
Updated vitals here.