Q: How can I choose what groups to post in? ...
Q: How about an example?
A: Ok. Let's say you want to report that Gretzky has been traded from
the Oilers to the Kings. Now right away you might think
rec.sport.hockey would be enough. WRONG. Many more people might be
interested. This is a big trade! Since it's a NEWS article, it
belongs in the news.* hierarchy as well. If you are a news admin, or
there is one on your machine, try news.admin. If not, use news.misc.
The Oilers are probably interested in geology, so try sci.physics. He
is a big star, so post to sci.astro, and sci.space because they are
also interested in stars. Next, his name is Polish sounding. So post
to soc.culture.polish. But that group doesn't exist, so cross-post to
news.groups suggesting it should be created. With this many groups of
interest, your article will be quite bizarre, so post to talk.bizarre
as well. (And post to comp.std.mumps, since they hardly get any
articles there, and a "comp" group will propagate your article
-- Brad Templeton, Emily Postnews Answers Your
Questions on Netiquette