For me it was "buy high quality pillow" because you sleep for one thrid of a day etc. I needed a new pillow anyway so I came to the store and bought the best they had. And it was ... ok. Like it's a fine pillow but my sleeping haven't improved really, it's basically the same. So I was disapointed :(
Honestly I can't remember an LPT I got use out of. I think the format tends to draw inane platitudes rather than actually good life advice.
Almost every "life pro tip" I've seen has been either ridiculously common knowledge (LPT: wipe your butt after pooping!) or weirdly specific recommendations (LPT: most frozen ravioli or tortellini can be cooked in a bowl of water in the microwave (this one is literally on the front page of the subreddit right now!)) or just straight up ads.