Hard drive going going ... almost gone

My computer won't stay on for longer than two minutes so i know the hard drive is crashing again. This is the third time since i've had it (2 1/2 years only!). At least this time i'll get a new computer according to the lemon law. Insh'Allah, they won't fight me over it like they have in the past. I've lost so much information, pictures, etc from the hard drive crashing. It won't let me back it up either. Everytime i start to do a backup, it crashes. I think i might play Dr. Kavorkian and assist it in it's slow and miserable death. It's suffered enough as it is. Poor thing.