The very first thing I paid attention to was a link from the main SD page in Threadspotting - something to do with some very deep place in the ocean and men being there for some brief period of time way back when.
I decided then and there to hang out some more in this place.
Another vote for the neti pot and for the Diva Cup. (There’s a curious symmetry in that pairing.)
But the other thing I found extremely valuable is that the weird, disturbed sleep I’ve experienced for years is hypnagogic hallucinations.
I was amazed that some women believe they pee out of their vagina. How do they think they pee when they’re having their period, and something is stuffed up there?
It’s one of the lesser known functions of the Diva Cup, clearly.
Another vote for the DivaCup. That thing has changed my life!
So after you learned about all this, P&S ensued? :dubious:
I can’t point to one specific thing I’ve learned from one posting here, but the Teeming Millions here have taught me to become a better critical thinker.
So thanks, everyone!
The terror of blimps.
I learned how dangerous it had been that I had been taking large doses of Tylenol for an extended period of time… didn’t really think it was a problem until I asked a question here one day and a helpful doper informed me on the danger to my liver…
I might be dead now if I hadn’t participated in that thread.
This one is sort of embarrassing and extremely recent…but I have never been told and it never occurred to me that if my car is accelerating out of my control, I should flip it in to neutral.
The way everyone talks about it makes me think that’s something any idiot should know, but I honestly had no idea. Of course, I don’t drive Toyotas 
but still I feel safer knowing it.
How to kill evil Nazi Groundhogs (or how not to).
I drive a Prius and this is what I was going to say.
I come here to renew my belief that humans are good. We think. We care. We give and receive from one another. We are capable of coming together as a community to help, advise, comfort, challenge, and commensurate. Here can be found our common bond that many of us use to add to our daily lives. We can be heroic when needed, we can be compassionate, we can be beautiful and mundane. I am astounded that this electronic medium has allowed us to be all that humans have always been…without meeting in real life.
That my internal organs can spontaneously fall out of my body.
Holy crap! I didn’t know that one!
Add this to the things I learned on the SDMB!
Last summer, right after I moved out on my own for the first time, there was a thread on ridiculously simple recipes. I was testing out the recipes for months afterwards! (For the record, the winner was haluski. Apparently, egg noodles, cottage cheese, cabbage, and onions taste really good together.)
I’ve learned to be more skeptical about the quackier side of alternative medicines and therapies (homeopathy, qigong, etc). I’d had quite a bit of trouble separating my “I want to believe” side of my brain from my “You’re full of shit” side.
I was in a years-long reading slump, and was turned on to many wonderful authors and books that reignited my love. Now if George RR Martin would just finish that damn next book…
Pleated pants simply look bad, no matter how many middle-managers are wear ing them. Middle-managers do not have a secret direct line into appropriate fashion sense for the workplace.
I can’t find this thread.