* iLife Saves the iLife data in your home folder. The default destination is CD or DVD; consider saving to an external hard drive.

* iTunes Library Backs up your iTunes media. You'll want to change the destination to an external hard drive, especially if you have a gigantic library.

* Custom Select the files you want.

If you use Time Machine and Backup, you'll have two easy ways to protect your data. Time Machine offers a quick and easy way to retrieve specific files, while Backup can protect you in case your Time Machine data goes bad. If possible, keep your Time Machine and Backup data on separate drives.