In general, one message per question works best. This makes it easier for others to search for that same question
and quickly find any relevant responses without having to dig through a lot of discussion of other issues.
There are several online services that have TiddlyWiki communities. GoogleGroups is the oldest and most active
of those, but Twitter and Reddit have their followers as well. I suspect that most people who are on Twitter
or Reddit also come here, so this is probably the best place to start when asking a question. Of course, when
looking for answers that might have already been posted, I'd check all sources (including the
mail-archive.com list,
which has "enhanced searching" compared with GoogleGroups (oh, the irony!)
-e