Honestly, I'm not altogether sure how or why I actually finished this book. I didn't enjoy the writing (more extensive editing would've cut down on errors, but also some of the more descriptive passages could've been completely omitted) and the author didn't seem especially credible, despite the many claims of extensive research and personal experimentation.

Too much of the "evidence" is anecdotal and/or seemingly copy-pasted from the literature (based on the proliferation of jargon and lack of elaboration), and some of it is just plain wrong, such as an assertion that antibiotics will promptly clear up a stomach virus. And even beyond the issues of citing a sample size of one (the author), apparently these sleep hacks were tried "all at once," which anyone with a basic understanding of the scientific method could tell you makes it impossible to demonstrate the efficacy of any of them.

Also, in several places the second guest chapter — which is also the last chapter, setting aside the one-page conclusion/author's note — actually contradicts the author's claims: not just opinions but [alleged] facts, such as the long-term effects of supplements and OTC medications.

Taken with a grain of salt, while most of these "hacks" wouldn't hurt to try, I didn't find them particularly useful. I already knew about circadian rhythms and white noise and mindfulness; I can't fit any kind of nap into my class-packed schedule and I'm not interested in forcing myself to eat pineapple every day on the off chance it'll help me fall asleep.