When I was 18 I had my first hard drive crash. I lost 6 months of photos, and since then I've been a backups believer. Or so I thought.
In college, Time Machine continuously backed up my MacBook. Moving out to San Francisco I got a new laptop for work and everything else gathered dust. At some point I gave away the college laptop. But a few weeks ago I needed to update some custom software I had written for Ace Mini Storage and realized that the source was only on that backup drive. Oops.
I'm now working my way through the drive, uploading everything I care about. I use Spanning Backup (highly recommended) on my Google Drive for an extra layer of protection. I'm properly backed up again, for now.