Stephen Covey's The 7 Habits of Highly Effective People has sold over 40 million copies since 1989. The habits include things like "Be Proactive," "Begin with the End in Mind," and "Put First Things First." These sound reasonable until you try to do all seven simultaneously, at which point you realize that being proactive about putting first things first while thinking win-win and synergizing with interdependence is a full-time job that leaves no time for your actual full-time job.
I read the book. All 432 pages. I made notes. I drew the diagrams. I understood the Circle of Influence versus the Circle of Concern. I committed to all seven habits. Within a week, I had abandoned six of them and was doing the seventh (Sharpen the Saw, which essentially means "take breaks") exclusively. Which, honestly, might be the only habit you need.
The book is not bad. The advice is solid, if you're the kind of person who can sustain seven concurrent behavioral changes indefinitely. If you're that person, you didn't need the book. If you're not that person — and statistically you're not — the book gives you seven new things to feel guilty about not doing. That's not a net improvement. That's a net increase in guilt, which is the opposite of what a self-help book should achieve but exactly what most of them do.