QUOTE(Zarkon @ Jul 6 2008, 09:58)

When freedb/discogs doesn't have your CD info, grab the tracklist from a website like Amazon, Musicbrainz, etc. and tag your files using that. Admittedly it's not always as straightforward as it sounds since copying from a website usually results in some unneeded info coming along with it.
I've found it absolutely indispensable in such cases. Often times, the wikipedia or amazon.com entry will have the detailed track list I'm looking for (with "featuring", "XYZ cover" type info). I use the command in that case.
Unneeded info isn't a problem for me because, atleast with the sources I'm using, the junk is pretty standard across lines so a simple %% usage solves the problem.