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.
(And yes, I have one. It's this: how in the world do people go about the supposedly atomic action of investing in the stock market? Here I am, sitting at my computer, and suppose I want a share of Apple - there isn't a button that says "Buy Our Stock" on their website. There goes my one idea. Where do I go and what do I do there?)
There are many who believe that the key to better hair is NOT using as much shampoo. Use as little as possible in order to not have greasy hair. This takes time to master. Some people need a full scrub every day. Some people need almost nothing. The homeostatis of your scalp is the key: using less shampoo should, over time, make your scalp produce less oil.
I'm down to a point where I go a day or two rinsing only, sometimes just a little bit of extra soap from when I washed my neck. When I wash my hair, I use very little shampoo...the bare minimum. Then, a few times a year I really wash it (and then it's all crazy for a few days).
note: I should point out that I do not appear any less "groomed" than the next guy, except when I procrastinate about getting a haircut. I have extensive client contact at work in a somewhat-trendy architecture firm, etc.
Dove Bar, unscented/sensative skin. I'm not a "product" guy but that's one product I highly recommend. A little extra attention at armpits, neck, feet, and of course the vitals, goes a long way.
IMPORTANT: deoderant. There are unscented brands, and delicate ones too. The "crystal" works for some, but I find it works in winter but not in summer (too hot, and the deoderant fails me, so I switch to an unscented antipersperant).
IMPORTANT: you can shower and deoderant all you want: you must wear fresh clothing. Fresh tshirt, socks, and underwear every day (the overshirt and pants you can wear multiple times). Synthetics stink more than cottons/wools: body oder bacteria can actually feed on the plastics in fleece, bras, socks, etc. Wash undergarments regularly, and wear cotton socks.
Concurring with minimal shampoo. Also, try conditioning with natural oils if your hair is dry (coconut oil in particular, though don't let it clog your drain).
If you really care about keeping long hair in great condition, wear it up or braided most of the time. I don't have the patience or the desire for that, so I have to trim my damaged ends more often than some do, also.
(I am female, with waist-length hair; I think of wearing my hair down rather than up as akin to using the good dishes rather than letting them sit in the cabinet.)