What Should I Do If My Hard Drive Has Crashed

As you know, hard disk is the most valuable part of computer. It's like your wallet, you many important things inside it. How if it crashed, WHAT SHOULD I DO ?

1. If you use IDE drive, check your data cable properly. If that's needed you can
replace it with a new one.
2. Try booting with boot CD to learn if the disk is readable. If it is, you can copy
your data with copy them to different drive. After that you can format drive that
crashed and hope that you can save your drive.
3. Your drive may has bad sector, try to locate it or perhaps to heal it.
4. Try to download tools that provide by your drive manufacture. You can try this

http://www.tacktech.com/display.cfm?ttid=287

If those step dont' helped, maybe you can try this (freezer trick) :

Put the drive in a plastic freezer bag (and wrap it in a paper towel for extra protection against moisture) to keep water out, and then freeze it for a few hours. Let it thaw back to room temperature after you take it out, and get rid of any condensation you see. There's no agreed-upon length of time to freeze it, but start with an hour and work your way up to 24 hours to see if you can make the drive spin up one last time.