Oh man, I eventually learned that if I don’t get at least 8.5 hours of sleep a night, (1) I can’t function worth a damn cognitively or emotionally, and (2) I’m not really aware of (1) at the time.
So I realize I keep telling everyone to get more sleep, and hopefully I’m not being too obnoxious, but it really is one of the best life hacks and cognitive enhancers there is - of course, easier said than done, but I’ve found it worth putting some time and effort in.