When creating a new torrent in uTorrent, there is a "skip files" field that has no obvious explanation as to how it should be used.
I wanted to omit OS X hidden files (.DS_Store etc.) and found the key while reading a uTorrent forum thread. I figured this is something I will likely forget, and that others will probably find useful so, for posterity, here it is.
The simplest option is to skip a single file of course:
You can also specify a pipe (|) separated list of filenames like this:
As you might expect, multiple files can also be targeted using an asterisk (*) as a wildcard. For example, to skip hidden OS X files (which all start with a ".") I used the following:
And finally, you can combine the two methods. The following example skips all files with a ".zip" or ".tar" extension: