Having a sensible backup strategy is vitally important, but so is knowing how to restore your backup if things go wrong. Microsoft's storage blog runs down how to make that happen in Windows 7.
The backup options in Windows 7 are pretty impressive compared to earlier releases, but people often don't look at how they work until disaster strikes. The MS post provides a useful summary of the options available for restoring single files you need back in a hurry.
Recovering your files in Windows 7 [Storage Team at Microsoft]