You can get your second wind, and have a much more productive afternoon, with a simple 20-minute nap. My family is full of nappers, and we grew up eating about six little meals per day, making sure to fill our late afternoon with a nice siesta, followed by a merienda (a sweet or salty snack with coffee or tea, to wake you up from the nap). No wonder we could all stay up until 1 am every night and then get back up at 6 am and do it all over again. In my twenties, the naps became "disco naps," in preparation for dancing all night with my friends. I know that the modern urban definition of "disco nap" involves Ecstasy rather than actual sleep, but believe me, I go for the real thing ~~ pure, unadulterated SLEEP BABY!
In law school, we had a large, quiet room, The MoFo Lounge, dedicated to the nappers among us! (We all know the lounge is named after the law firm which funded it, but the double entendre is funny because lay people think we legal people are all MoFo's anyway. Ahh, but I digress.) Sure MoFo was technically the quiet room for studying, but, come on, there were couches in there! One (well, mainly me) could stretch out fully on the couch, and that gave you carte blanche to jolt up and give a dirty look to the freak who dared make noise by turning a page in a book. It was heaven. Well, it was law school and so I had to find joy where I could, ok?
Now, out in the real world, my body still expects naps. Around 3 pm every day, after lunch, when others are zoning-out on their post-lunch, biorhythm crash, I go out to my car, open the sun roof so the bay breeze can float in, I set my little alarm for 20 minutes, and I recline the seat allllll the way back. I'm not talking about just reclining a little and dozing off ~ I'm talking taking off my shoes, grabbing my blanky, getting into full horizontal position, and enjoying a power nap for a full 20 minutes. If I can't go outside, I turn off the lights in my office and literally just lie down on the floor. Everyone in the office knows I will be much happier, and thus they will be much happier, if I can just get my nap. At every job I have ever had, there has been nap time.
What we learned in Kindergarten applies in the chaotic grown-up world, too: Naps are Gooooood.