How often do you back up your data?
I just backed-up my data yesterday, and it feels good. I used three USB flash drives and also an external hard drive. I also use Time Machine with Apple's Time Capsule. I will put some of this data on two other computers. So now I have plenty of redundancy. Windows 7 has a very easy and straightforward way to create a disk image which I have done. I use Amazon Drive as an off-site back-up solution. I do feel a sense of relief because I can't afford to lose my data. Also, your important data should not just be in one location, but preferably TWO (one off site). If you have just one copy, you are not backed up!