Full tablet backup.
My wife changed pattern locks several times on this tablet because the previous swipes used for screen lock were seen by her coworkers. After not using the tablet for a few days, she simply forgot the right unlock swipe. Since we got important personal data on the device, restoring the device to factory settings was not an option. passcodeunlock.com unlocked the screen and made a full backup at a very reasonable price, we got our data back. We learned our lesson, always create backups of your important data!