Scrubbing chapters and not losing stop points on audiobooks on iPod nano
If it works the same as an iPhone, on the headphone cable press the volume down button (-) 3 times in quick succession and hold it down on the 3rd press. This goes into a rewind mode that rewinds as long as you hold the button down.

You can go into a fast forward mode in a similar manner with 2 presses and hold down.