Type backup into the start box, in Backup Center>Create a System Image stored in a Primary formatted partition internally with a copy made to external drive in case of HDD failure.
If recovery is needed, boot from the Win7 installer/Repair disk and select Repair My Computer>Recover Using an Image which will autodetect image and reimage HD (or replacement) flawlessly in 15 minutes. This replaces reinstalls.
In order to make a partition which can boot itself to recover (marked active with F-key at bootup), you need to use one of the more expensive imaging programs like Paragon Hard Disk Manager and follow the instructions for creating a hidden recovery "capsule."
The free Backup imaging which comes with Win7 only requires the extra step to boot into Repair console on DVD/Repair disk or by tapping F8 at bootup if you have the 100mb boot/repair partition.