Don't ever try to force a disk into a drive. For that matter, don't force any of the connecting cable plugs, either. The tiny pins could be bent and your connector ruined. Hard disks, floppy disks, and removable cartridges are all magnetic. You could erase or change them by exposing them to magnets.
Monitors are also sensitive to magnets.
Mac's have feelings, too. Seriously, your Mac will tend to reflect your general attitude toward it. If you're nice to it, it will work better for you. Excerpted from article of same name by Cheryl Jencks in Club Mac of Monterey Journal for May 1993.