Time Capsule
It's created by Mac, and it's brilliant! It's this thing called a Time Capsule, which is essentially an external hard drive for your computer (which is brilliant enough in its own regard) but they've set this thing up on a wireless network with a program they call Time Machine. The idea is that as soon as you walk into proximity of this thing (say into your house or work) and turn your computer on, it does an automatic backup of you whole system. Then, when something horrible happens and you have lost everything on your computer, you can just go back and get it on your 'time capsule'.
The best part is that if you somehow screw your system up (or a file or whatever), you can opt to go back to last Friday (or whatever day in the last year or something) and recover your whole system (or any file) to the state it was in at that time. So if you got a computer virus (which you wouldn't anyways because you are using a Mac Laptop) than you could just re-load how your computer was yesterday morning, and lose nothing.
I love it and I want it. But it's only on Mac computers.
Someone tell Bill Gates to get on it. Or Dell or whoever. I want my microsoft version of instant and easy protection from having the worst computer luck in the world. Then I could stop wasting half my life backing my files up onto two computers, two external hard drives and DVD. Cause seriously, I don't even know where things are anymore.
My next laptop will be a mac I think