So many year I had been in computer line, dealing with computer hack (virus infection) and crash, I feel that the best solution to these problems is backup.
Try and keep at least a copy of your backup elsewhere. If there is anything happen to your system you can easily reload and transfer data back to system to start everything again.

Without backup basically you will be facing lost of data and unable to continue your work.

There are several way of backup, one is to make use of the technology like dropbox to keep on the important thing, or make use of Google drive or Hotmail skydrive.
There are even third party cloud solution like sugarsync which offer a good amount of space for backup. There are other around as well. (Maybe i will write some articles on those if i am free).

Another other backup method are setting up your own cloud like WD Live Duo which offer a good platform for your backup and have a RAID as addidtion protection of you data. Or you can use the Netgear ReadyNAS DUO or Buffalo LinkStation as your backup. Anything is better then none.

The other form is just to buy a portable hard drive which should be bigger then your system and perform backup onto the portable hard drive. This is also good as you can carry along or store it in a safe location.

Alternative if you have two system try backing up one system data to another and another system data to this by creating a share on both system. So if there is any problem with either one you will still have a copy of backup laying on the other system.

One other form is to burn into CD or DVD rom. Or copy onto USB flash drive.

Regards
Hickural