I was gifted an unopened pack of 3.5" floppy disks. What should I do with them? (wrong answers only)

sure, use arj to compress doom to your disk:
c:\games\doom\ arj a -va a:\doom.arj

It fits on 4 floppies that way is I remember correctly.

As I recall, my windows 95 CD-ROM contained a bunch of floppy-sized .cab files in a folder, so it's entirely possible it was available as a set of floppies...