Writing diaries from the perspective of an error notebook is meaningful.

Grind problems, categorize, correct errors, and advance iteratively.

Self-blame is just a negligible interjection; the two more important parts lie in problem identification and solution implementation.

To quantify a problem, you need to accumulate data. With data, you can chart whether things are rising, falling, or holding steady. This lets you see exactly how much money a specific action costs you—and how much you could earn by changing it. After adopting the new approach and tracking results over several days, you confirm that under similar conditions, you've earned significantly more. That's quantifying your own behavior: when changing your actions leads to higher returns, you've pinpointed the right lever and pulled it correctly.

For some people, journaling is deeply meaningful. It turns you into a system—constantly optimizing, training yourself programmatically, quantifying yourself, and ultimately elevating yourself.