If you want to go deeper into this topic, I recommend: There certainly are other concepts in self-improvement I've skipped over here. Some ideas are important, but didn't seem as universal so I excluded them (compound growth, progressive training, metrics). If you have your own thoughts of core ideas that come up again and again in self-improvement, please share in the comments!

Thoughts can also create emotional feelings as well, and thus we may want to control our thoughts even if we don't care so much about changing our external outcomes. The constant worrier may have a nagging voice in her head that says her success never counts. The importance of thoughts and beliefs ranges depending on whom you ask. For some, beliefs have mystical powers that transcend a physically justifiable version of reality. To believe something is, in a certain sense, to literally make it true. Others reject the supernatural, but argue that beliefs still highly constrain our attention, making self-fulfilling prophecies frequent. On the opposite extreme are those that argue for a mostly passive role of beliefs, recording the world but not much changing outcomes. To those people, having true beliefs matters more than believing things to make them true. Regardless of where you sit in this spectrum, the content of our thoughts and beliefs is central to self-improvement.

However, I think there are some common themes to the art of living better. These ideas are pervasive, coming up again and again. Even in the writing of people who take a stand against them, their prevalence still requires that they be acknowledged. Nearly all forms of self-improvement first require that you change your behavior. Unless the improvement you're after is purely mental, you're going to have to actually do something first.

Habittttt

In any field, there are a few ideas that are core to understanding everything else. Biology makes little sense without evolution. Physics without symmetries and conservation laws is baffling. All mathematics can be built out of sets. Self-improvement isn't usually regarded as an intellectual field.

What are the Core Ideas of Self-Improvement? | Scott H Young

Mayank Sharma