What could be worse than losing your data?  Not being able to recover it.  I mean how long would it take to re-create your wedding photos?  Well you only had them stored on your hard drive and you would not want to take the time to implement a backup solution would you?  

Various backup solutions exist, but the best one is the one that you will use.  Actually, it is best to have 2 backups, one off-site.

I recommend SuperDuper! by Shirt Pocket. The great part about it is that you can set it to automatically backup at a pre-determined interval. 

Starlight Media can help you to configure SuperDuper! and make other backup recommendations as well.  Make backing up your computer your resolution for this year!