We've got built-in sanitize commands, overwriting, encryption, and my favorite:
3.2.3 Degaussing
We also evaluated degaussing as a method for erasing SSDs. Degaussing is a fast, effective means of destroying hard drives, since it removes the disks low-level formatting (along with all the data) and damages the drive motor.
...
In all cases, the data remained intact.
Yeah, it's apparently a tricky little feat...
(via The Brooks Review)