Wondering where all your hard disk space is gone? Look at that, it's being taken up by all that Celine Dion music! That's easy to fix: just find the offending directory, press delete, and you just freed two gigabytes of hard disk space!
But it's not always that easy. I found myself with song after song I don't like anymore throughout my music collection and no easy way to clean up, so I created a Winamp plugin that allows me to eliminate those cheesy songs one by one as they come up when I listen with Winamp.
The plugin is at http://www.winamp.com/plugins/details/221543.
It adds a system tray icon that you can click when the currently playing song is NOT music to your ears. The main idea was to recreate the directory structure of the music collection in another root directory in order to archive the songs I don't like anymore and maybe even delete them. So for example, if I have "C:\My Music\New\Singles\Madonna - 4 Minutes.mp3", I click the system tray icon and the file moves to "C:\My Music to Archive\New\Singles\Madonna - 4 Minutes.mp3".