Windows (all recent versions), has a little-used facility that lets you add your own notes to some types of files. As Propellerhead points out these are hidden from normal view but easily accessible and remain attached to the file, even if it is copied to another location. For example, you could add a short title or description to an image file, detailing where it was taken, the people in the photograph and so on.
You can do something similar with audio files (though oddly enough not document or video files). It’s really easy too, simply right-click on the file icon in My Computer or Windows Explorer, select Properties, then the Summary Tab (In pre XP versions of Windows click the Custom tab) and type your notes in the Comments box. If you like that simple little tweak then there are hundreds more great tips for you to try on the PCTopTips website.