I am in America.
Meetup, library boards, etc. are useful, but I don't need more groups, I need to know which of my many choices are likely to be useful. I'd like to do better than showing up at vaguely interesting meetups and seeing if they happen to be comprised of interesting people... Although this basically is what I have been doing. It is not a motivating task.
Volunteering tends to be very good, except that there is usually (in my area) an oversupply of religious people at the non-political charities, and an oversupply of mindkilled people at the political ones. Still, a good suggestion, and I should probably focus on finding new opportunities of this sort.
I think these are good general suggestions that fit well into this thread, but they are not quite what I was looking for. However, the fact that you could provide a fairly comprehensive list that more or less matches my own does confirm that I am not missing any easy targets, and that is very useful information.
I know of a project to start building a list of related groups; but even that will be limited to "explore and find out to confirm". Without us explicitly knowing what "lesswrongers" are; other than people who hang around lesswrong.com; its quite hard to find others quite like our little in-group.
This thread is for asking the rationalist community for practical advice. It's inspired by the stupid questions series, but with an explicit focus on instrumental rationality.
Questions ranging from easy ("this is probably trivial for half the people on this site") to hard ("maybe someone here has a good answer, but probably not") are welcome. However, please stick to problems that you actually face or anticipate facing soon, not hypotheticals.
As with the stupid questions thread, don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better, and please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
(See also the Boring Advice Repository)