You do have a plan for backing up your data, right? You've heard the saying "it's not a matter of 'if' your computer crashes but 'when'." Personally, I use Chronosync to automatically backup my iMac to my Time Capsule. I hope you do something similar.
But what's your offsite backup plan? I had a friend email me last weekend. Someone broke into his house and stole his laptop and the external harddrive he used for data backup. He lost everything. He had no files left from seminary. So what's your offsite backup plan? From time to time I burn my data to a DVD and sent it to my father's house. If thieves steal my stuff or a fire burns my house down, I'll at least have my most critical data available to me.
If you've got a good idea for an offsite backup plan, leave it in the comments.