Like other spiritual texts, you can just take out what you want and leave the rest. The Second Agreement, don't take anything personally is something everyone should live by.
It works for job hunting, it works for career growth, it works for dating, it works for friendships.
The more you take everything that happens to you as a personal attack, the more miserable you'll be. For example, let's say you just put in an 80 hour work week, you're really proud that a feature got pushed out. But You get let go the next week, don't take it personally. Often, it's for things outside of your control, if you're in this industry for any real amount of time, you're going to have a bad manager who will actively prevent you from getting your job done. All you can really do is pick yourself up and move on.
When you take things personally, you're getting upset over nothing at all. I take it the same way with dating, for example, you really like someone and then it doesn't work out, you can dwell on this and call them asking for an explanation, but you're not changing anything.
The secret, originally comes from Earl Nightingale. His original message, we become what we think about is great wisdom.
I don't use social media, because if I'm arguing with folks on Instagram and Twitter all day, I'm becoming negativity. I'm preemptively wasting tons of mental energy trying to figure out how I'm going to respond to negativity I'm choosing to partake in.
The Power of Now is another fantastic book. Using myself as an example, recently I've been spending a ton of time planning out if I get a new job, if I would like to move or not. And then I'm worried about well... If I move, where do I move, will I be able to find a cheaper apartment, will I be able to save money, and a million other thoughts?
All of this is irrelevant if I don't actually get the job!
The only self-help book I really didn't like, was Mark Manson's art of not giving a f**. And mainly because the messenger. I can't take life advice from anyone who's never had to work because he comes from money.
I know many new age spiritualists and have had in depth conversations with them regarding what they believe and I can tell you, at least those people believe a staggering amount of supernatural things and they will tell you this directly usually. As in if you asked them if they believe in the supernatural, they will give you an emphatic yes.
People in this thread are incredulous that the "educated" believe in this stuff, and yet most of these spiritualists are college educated and then the apologists who say "it isn't really supernatural" are college educated as well.
I personally take these people about as seriously as if someone told me they could make money manifest in a pot. It's indefensible to have received the amount of education these people have received and have access to the unlimited knowledge in our current society and to believe what amounts to kids' fairy stories.