Mozy is a free backup service for home use. As a home user, you will have 2GB of space to automatically backup. With the software (PC and Mac) you can automatically backup important files and leftovers. One also offers the possibility to do a restore via a CD/DVD, but here you have a fee. You can also increase the 2GB by paying a monthly fee.
Also take advantage of Mozy and grab that 2GB of storage space.