Reading this is like attending therapy sessions with a decent, although not excellent, therapist. A lot of what's in here is essentially repeated everywhere: sleep enough, eat good food, exercise, build solid friendships, etc. What I found most meaningful was her distinction between "false anxiety," which is just your body telling you to fulfill an immediate need (e.g. "Feed me!" "I'm so tired I need to sleep!") and "true anxiety," which becomes apparent once all everyday needs are filled. True anxiety is essentially the "north star" that tells you what you should be doing with your life, and if it's ignored it'll show up physiologically.
I think my "true anxiety" is telling me to run away from human society, hole out in a forest, and simply read and write about whatever I want. Unfortunately, I have bills to pay.