Quote from kowboy:
It saves a whole lot of times where you can restore to. Quite often I need to go back several time increments to get a good start.

3. http://www.apple.comWhether you get it back up or not, for the future consider:
1. Norton Ghost or a similar imaging program (Acronis Truebackup, etc).
2. Online backups : http://www.systemrecovery.com/