Slick though it may be, even Apple's iPad needs to be restarted every once in a while. There are two means to reset and iPad: one for normal use and one if you're finding your applications or files are frozen. This latter type of reset is the first diagnostic step before attempting more serious means of recovery, and while there's no guarantee this method will preserve your work if you're in the middle of drafting an email or writing a document, it in no way jeopardizes the rest of the files on your iPad.
Restarting the Apple iPad Normally
Find the "Sleep/Wake" button located on the top of the iPad and depress it for several seconds.
Locate the "Power Off" slider that will display on the iPad screen.
Use your finger to swipe the "Power Off" slider completely across. This will power down your iPad.
To restart, depress the "Sleep/Wake" button on top of the iPad again. This will restore power to the iPad.
Restarting the iPad in the Event of a Freeze
Locate both the "Sleep/Wake" button at the top of the iPad and the "Home" button, located underneath the screen when the iPad is held in vertical orientation.
Hold both buttons down until you see the iPad screen flash and turn black.
Depress the "Sleep/Wake" button on top to restore power to the device.