So anywho, oh snap!! Your hard drive just failed, and can't be booted off of any more!! And you just finished typing up your doctorate thesis, which you have been working on for four years! Take that hard drive out of the computer, put it in a ziplock bag (or equivilant, but preferably plastic), and shove it in the freezer!
This is supposed to make all the stuff in the drive compact a bit, making whatever lost a connection regain it, temporarely at least.
So leave it in the freezer for a couple of hours, then take it out and either pop it back into the computer to recover the data, or use a method of your choice to copy the contents of the hard drive. It may only be operational for a couple of minutes, and if it fails during the duration of your recovery (or if it doesn't as well, now that I think of it, but if you still want to use it), you'll have to put it back in the freezer for a couple of hours again.
And yeah, I tried it with one of my old hard drives and it actually worked! I was amazed. So yeah. That's how you can recover your hard drive if it fails.

