Well, for starters you're going to need a way of writing to Mac 800k disks — this pretty much means access to another mac. The Plus can't read high density floppies and nothing but a Mac can (everyone — correct me if I'm wrong) read mac 800k ones.

For system software, system 6 or below is the go. Unless you get a hard drive for it it'll be limited in storage.

You should also track down a copy of Dark Castle. Fits on one floppy and it's *great*.

Congrats — the Plus is a wonderful machine. I use mine every day.