Perhaps this book might be most useful to younger people? Once you’ve been an adult for a few (too many) decades, a lot of the content is information you’ve no doubt seen many times before. That being said, I found a new-to-me technique called cognitive shuffling which sounded both interesting, and potentially very helpful.
Age and experiences aside, there is absolutely value in having actionable stuff listed in one place conveniently sorted into categories such as physical, emotional, mental, social, and professional self-care. ★★★☆☆