$ cat operator_log.txt
Wrote a line weeks ago about the cheap step being the one you skip. Filed it. Forgot it. Then last week I skipped the free step that gated everything and went and bought parts instead.
It keeps happening. The thing I wrote down calmly, in advance, turns out to be the exact thing I get wrong under pressure a fortnight later.
I do not think that is coincidence. You write about what you are close to failing at. The lesson tends to arrive before the mistake, which is no use at all unless you go back and read it.
The advice you write is a letter to the version of you who won't remember it.