Follow-up to: Boring Advice Repository
Many practical problems in instrumental rationality appear to be wide open. Two I've been annoyed by recently are "what should I eat?" and "how should I exercise?" However, some appear to be more or less solved. For example, various mnemonic techniques like memory palaces, along with spaced repetition, seem to more or less solve the problem of memorization.
I would like people to use this thread to post other examples of solved problems in instrumental rationality. I'm pretty sure you all collectively know good examples; there's a comment I can't find from a user who said something like "taking a flattering photograph of yourself is a solved problem," and it's likely that there are other useful examples like this that aren't common knowledge. Err on the side of posting solutions which may not be universal but are still likely to be helpful to many people.
(This thread is allowed to not be boring! Go wild!)
The part I don't understand is why people want to be stronger as opposed to be more visually muscular. This is not the same thing, for the later goal traditional body-building i.e. one composite and one isolation exercise for every major muscle group works better. Also it is more like 5 x 8 or 5 x 10. A lot of strong people end up still being fairly thin.
What is the utility of strength without beach looks today? I just pay movers to carry furniture from the old apartment to the new. Even in a brawl, punching strength depends more on knowing how to use gravity.
You can do more, it feels better, and your body lasts longer.