For people I actually care about, I have better means of staying in touch. My inner circle has had a private voice chat server for years now, and that's part of the reason I haven't really been forced to use a social networking website.
But I'm trying to dramatically change who I am as a person, and this is a necessary step. I have severe issues with self-consciousness and social anxiety (despite acknowledging that this is unjustified as I am affable and attractive) so I am generally looking for ways to ease myself into social normalcy.
You need to be more specific though; or at least you have the advantage of being able to choose specifically what you want to use it for. For example, I pretty much only use Facebook for sharing pictures and videos of my kid. I may go weeks without paying attention to it. I have a wide mix of people including both people at work, family and old friends from highschool who I would normally share this type of thing with when they ask. So now when someone asks about my kid I'll just ask if I can friend them.
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?)