Oooorrrrr you just keep the RTF that you made the LRF from and store it away in an archival area on the hard drive (or if you have THAT many) or a CD/DVD. Unlike paper, electrons take up, oh, probably less than half the space of actual paper. Maybe even less than a third!

Packratting texts is probably one of the easiest things to do when done correctly and makes more sense than, say, collecting Battlemech miniatures. (Oh, gotta remember to dust soon...)

At our house the procedure is
1) clean RTF,
2) copy into a seperate area,
3) convert the original into LRF (But only if it will be read more than once, holds pictures that are needed for the document, or will reside for a long time in the reader. Otherwise it's left as RTF.) and then
4) delete the RTF from the directory.
Supplemental 5) Make sure you read the file first if there might be some conflict over who gets the reader next. (If they don't know about it, they can't fight over it.)