With Alicorn's permission, I'm resurrecting this thread.
I am beginning to suspect that it is surprisingly common for intelligent, competent adults to somehow make it through the world for a few decades while missing some ordinary skill, like mailing a physical letter, folding a fitted sheet, depositing a check, or reading a bus schedule. Since these tasks are often presented atomically - or, worse, embedded implicitly into other instructions - and it is often possible to get around the need for them, this ignorance is not self-correcting. One can Google "how to deposit a check" and similar phrases, but the sorts of instructions that crop up are often misleading, rely on entangled and potentially similarly-deficient knowledge to be understandable, or are not so much instructions as they are tips and tricks and warnings for people who already know the basic procedure. Asking other people is more effective because they can respond to requests for clarification (and physically pointing at stuff is useful too), but embarrassing, since lacking these skills as an adult is stigmatized. (They are rarely even considered skills by people who have had them for a while.)
This seems like a bad situation. And - if I am correct and gaps like these are common - then it is something of a collective action problem to handle gap-filling without undue social drama. Supposedly, we're good at collective action problems, us rationalists, right? So I propose a thread for the purpose here, with the stipulation that all replies to gap announcements are to be constructive attempts at conveying the relevant procedural knowledge. No asking "how did you manage to be X years old without knowing that?" - if the gap-haver wishes to volunteer the information, that is fine, but asking is to be considered poor form.
I'll start off with one of my own: What kinds of exercise can I do at home (I do have 5- and 20-pound weights), and what are good ways to get motivation to do so regularly?
How do I cook food that is at the intersection of cheap, fast to prepare, good tasting, and good for me? It is fairly easy to satisfy 3 of the 4 conditions with any given meal. All 4 are hard.
So far I only really have various soups/curries, and omelettes. I'm on the lookout for more, though it is tedious looking through "normal" recipes and trying to figure out which ones can be made to satisfy the conditions by cutting corners and still come out okay.
edit: I guess I should note that I have a definition of "healthy" some will consider weird. I don't consider bread to be healthy food, it is nutritionally empty space. Most of the nutrients you see listed on the package come from enrichment which does next to nothing for you bioavailability wise. The carbs I require for physical activity come from potatoes.
This might not be exactly what you're asking for, but it's worth noting the power of leftovers if you haven't already! If you're bothering to cook, most of the time it hardly takes any more time to cook twice as much as you're going to eat right now, or even more. That's at least one more meal for the next few days solved. If you have a freezer, developing a small stockpile of frozen leftovers in it is excellent for the fast-to-prepare dimension. Also note that preparation time speeds up a lot with practice.