The best option is to get a program like Nero or Acronis.
The full price of Acronis is about £40.00 and Nero about £60.00.
The Nero one has a lot more than just backup, as it also includes Audio recording,Video /DVD burning and a lot of other uses.
The main advantage is you back up your system (using either program), create a Boot CD, and this will in emergency, allow you to boot to(even with a formatted / blank) and re-create your hard drive as it was when you created the backup file.
Please note, The Nero and Acronis systems are NOT compatible, so you can use one or the other, however free trials are available on both so you can try them out for yourself.
Nero click here
Acronis click here