Rename: Change the name of the file. Filr preserves the extension so you don't have to.
Tag: Filr allows you to easily add and modify OpenMeta tags, so it's perfect for a tag-based workflow.
Comment: FIlr can show and edit the file's Spotlight comments, so you can add short notes to any file.
When used with a Folder Action script or a 3rd-party scripting application like Hazel, you can add a group of files to a folder and then immediately step through each one, changing its name, tags, and comment to something appropriate for the file. It's quick and seamless.