How can I restore an iPad to factory defaults? I'm planning to sell / give my old iPad to a friend.  I've already saved everything that I want off of the old iPad.  How can I restore the old iPad to factory default settings so that my friend can start fresh?

It's a first-gen iPad, in case it matters.
In iPad Settings, go to General, then Reset, then "Erase All Contents and Settings". The next thing you see ( after confirmation) is the welcome screen as if just out of the box.

Also: If shipping it you might want to power off by holding top and bottom buttons until you see the "slide to power off" slider. I recently sold my iPad 2, cleared it to factory settings as described and powered off. Happy new owner received it with charge, ready to configure.