Apricom DriveWire makes cloning your hard drive easy
The DriveWire is a product I could really use. I tend to have some... difficulties with computes. I kill them. It's only after everything I hold near and dear is gone that I remember I didn't back anything up and I've lost it all.
DriveWire is a cloning device for your hard drive and it works via USB (as does everything these days). The EZ Gig II Software, which is "a bootable CD" lets you connect through the HDD adapter and is compatible with any operating system.
The best part is that it only costs $39.99 which I think is extremely reasonable. The only problem I'd have with this product is that it's so small I'd probably lose it/forget where I put it.