Best way to create playlist?

Is there software that will allow me to create playlists quickly on my computer?  Napster comes close, but I always run into compatiblity problems with some wma files.  Anything else?

Windows Media Player 10 and 11 will work.

Here are videos on how to create playlists
                                      Click Here

I myself use Winamp for creating and transferring
playlists. It is easy with Winamp once you know
how!!! It’s not hard to figure out.