I use SuperDuper! (http://www.shirt-pocket.com http://www.shirt-pocket.com) to copy the SSD in my MBP to a disk image on an external hard drive once every day.

I use SuperDuper! (http://www.shirt-pocket.com http://www.shirt-pocket.com) to copy the SSD in my MBP to a disk image on an external hard drive once every day. The content of this hard drive is mirrored to another hard drive. I also use Time Machine on yet another external hard drive, mostly for recovering individual files. And in case of fire, theft or some other sort of local accident, I have all my files stored with Backblaze (http://www.backblaze.com http://www.backblaze.com). This backup-setup has yet to fail me. I had a chance to put it to the test last month, and a few hours after my computer initially refused to fully boot, it was up and running as if nothing had happened after restoring from the SuperDuper! backup.