Alas, humans are like cell phones; they require some downtime to recharge.
It's best to schedule the recharging of your human in advance; failure to do so carries the risk of human dozing off in the middle of a conversation, or while driving, or while working, or simply not being very effective at what they are doing.

Ensure proper maintenance to get the most out of your human!

Hrmpph, damned manufacturer didn't ship my human with a manual and all I find online are forum threads with conflicting advice and StackOverflow questions that were closed for being "too general".

Unlike the case for other products, the manufacturers of humans generally aren't the best source of maintenance advice...

But there are alternatives. For example, for the last few decades people have been working hard on backward-engineering this weird obfuscated piece of equipment called "a brain" (some humans seems to use it), and they managed to come up with a bunch of sort-of manuals; they call them "psychology textbooks". I can definitely recommend David Myer's "Psychology"; it's a fun read, quite thorough, explains many things by showing how they figured stuff out, and describes how stuff works and what to do to get the most of it; works pretty well as a manual.

(It is safe to ignore any manuals from the "popular psychology" and "self-help" genres, as most of them are generally very subjective and as a result: not much better than manufacturer's advice. Proper information is much more useful.)

Hmm, this one? Well, I certainly don't mind a book recommendation, thanks.

Yeah, it's this one, though I remember they used to be cheaper.
You could get a used 10th edition for a lot less, and it should be good enough; mine is a 3rd edition and most of it is still relevant.