To get to the floppy you first need to mount it. If you post what desktop / windowing manager you are using (KDE/Gnome/etc...) then I'm sure that someone can tell you the nice graphical utility to use. In the mean time try something like this from a terminal
mount /dev/fd0 /mnt/floppy
this should mount your floppy under /mnt/floppy. You can now just save your documents to /mnt/floppy and they'll be written to the disk. Just remember to run
before you eject the disk!! Otherwise you might loose some data.
If for some reason this doesn't work post the error in this thread.