I've heard Maximum Achievement by Brian Tracy is good. Haven't read it though.
I heard about that book via Blackdragon back in like 2010. It played a large role in my life in my early 20s; would highly recommend it to anyone. Probably the #2 self-help book of all time that I've ever read, behind Dale Carnegie's How to Stop Worrying and Start Living... I love all of Brian Tracy's stuff, especially as a salesman, but Maximum Achievement pretty much sums up all of his core messages/advice.
I think in order to make the most out of any sort of self-help book you really have to be a "pro-active skeptic," as Tim Ferris called it. Meaning, you can't just blindly follow every guru's advice and expect it to work out... and at the same time you can't just dismiss all of their woo-woo advice because you have your own reasons to doubt it.
The biggest recurring theme I've noticed among self-help authors is that they tend to preach the merits of having an internal locus of control, or essentially the belief that who you are today and what you're doing right now is the product of your own decision-making, rather than fate/luck. In his famous The 7 Habits of Highly Effective People, Stephen Covey refers to this as "being proactive" instead of "being reactive." Tracy calls this "complete responsibility."
Tracy will go as far as to say things such as, "It's literally impossible to feel a negative emotion at the same time as accepting complete responsibility for something bad that happens to you," and this is true for people who have never maintained this thought process before... but for someone like me, who's been trying to follow this train of thought for almost a decade now, I can tell you for a fact that there will be times where claiming 100% responsibility will take its toll on you
To be more specific, when really upsetting things happen to me, and I think of how it was my responsibility, I'll consequently feel guilty or frustrated for not acting differently. But at the same time, it's still a self-empowering mentality to have. Because ultimately, if it's not my fault, then whose was it? And if I'm not the one who can change my decisions to change the outcome, then that's really discouraging IMO, because it's still a lot easier to change my own decisions/beliefs than it is to change someone else's.
Ultimately, though, there's no real truth or answer as to whether or not we truly have free will, and thus the ability to accept 100% responsibility for everything that happens to us, both good and bad. But IME the belief that you're at the world's mercy and everything you do is predetermined is a losing strategy in pretty much every aspect of life Even if it isn't always your fault, it's still best to ask yourself what you could do differently to prevent similar bad things from happening again in the future and to keep having good things happening to you.
Like, you could argue that any time I go somewhere in public, there's a chance of a mass shooting happening. But I know the odds of that happening are extremely low, so I take the "risk" and go about my business, assuming that I won't personally experience a mass shooting in my lifetime. Though if I were to ever be in the wrong place at the wrong time and experience a mass shooting, I wouldn't blame myself for being there, because I knew that the odds were so low and I was legitimately unfortunate.
However, if I were to somehow, for some reason, willingly and knowingly, move to an area with the highest gun violence, and then become a victim of it, I'd mostly blame myself for it. Because I knew the risk, accepted it, and was punished for it.
Hopefully the differences between those examples is clear enough. A big part of my life is constantly assessing the consequences of my own decisions, as well as constantly monitoring my own behaviors because there's tons of decisions I make on a daily basis, completely on auto-pilot. It's difficult to try and assess the "risk" of every decision you're making, because that becomes a fundamental aspect of accepting as much responsibility as possible for your life.
It's exhausting... but it's worth it IMO. But because it's exhausting, I can understand why I'm in the minority when it comes to this train of thought, so nowadays I try to no longer blame others for not adopting my philosophy.
Hope that makes sense. I guess what I'm basically saying is: experiment with their advice for yourself and see if it improves your life; they mean the best for you and you don't really have much to lose by trying it out... but also try to examine all of their claims with a healthy skepticism to examine the limits of their advice.
Also thanks for opening the can of worms, y_guy. I haven't written a long post on this forum in a long time and I forgot how fun and cathartic it is