I got up early without much hesitation, got ready, ate a nutritious breakfast, and started working on my coal research. I went until 12:45, at which point I stopped to nap. Up until then, I had been fighting sleep, despite already having had a cup of coffee. On the one hand, I felt like it would be a waste of time to continue to struggle with tiredness and that it would be better to nap ASAP and then get back into my work refreshed; on the other hand, I wondered if I'd actually be able to keep my nap short and get back out of bed. I decided to nap, and I was not able to get back out of bed when my alarm went off. I think this experience settles my personal debate about naps: I should avoid them at all costs unless it's an absolute emergency, like those times during the semester when I basically had to choose between literally passing out, or taking a controlled nap in the library. In general, I'm going to push through the best that I can (for whatever reason, I don't handle naps well. I feel horrible if I wake up before my body wants to, and I've tried the 20-30 minute thing, and it doesn't work).
Despite that, I still got my planned 10 hours of work complete, worked out, checked my e-mails, and made my budget for the coming month. The workout was tough, but my body handled it surprisingly well. It was cold though...Anyway, the work was productive and it felt good to focus and be industrious again. I think I've allowed myself adequate rest time for the vacation, so now I can start again, and make sure to maintain a sustainable routine so I don't burn out again.