What should I do if my I-pod just turned off and won't turn back on no matter what I do?
If you iPod just turned off by itself you can take it to a technician. Alternatively, if its warrant has not expired you can take it back to the store where you bought it.
I fix iPods just hold on lock and home five seconds will work that happend to me twice
Stupid answer but...try plugging it in, maybe the battery is dead.
Press down and hold the menu and center buttons for 10 seconds. It should reboot. Mine did this to me once and nearly gave me a stroke.