While not applicable for general file searches and static files, projects or documents that you author are best stored in a version control system, such as CVS or SourceSafe (No flames!). That way, not only do you have a structured storage of the document, but you have revision control. If you leave two copies laying around, you don't have to spend time worrying about which one is the later version (date/time stamps are not *always* indicative).
And, a resume is a good place to start to learn how to use those tools, rather than in the middle of a large project that just got out of hand.
I spent many many days backing projects written 10 years ago into SourceSafe. It can be difficult to get in to the habit of using version control, but once you start, it's pretty addicitive. I typically use SourceSafe, so I can't comment on this for CVS, but with SourceSafe projects, they're stored in a directory away from the current project. It makes it very easy to cut these to CD on a regular basis.
--Chris
e-mail jcwren