You can soft and hard reset your iPod Touch if it’s frozen or not responding. I’ve had to perform these steps a few times if I haven’t used the device in a while, when it has gotten stuck during a sync, won’t turn on or is stuck on a certain screen.
1. Press and hold the Sleep/Wake button on the top of the unit until a red slider appears
2. Drag the slider.
3. Press and hold the Sleep/Wake button until the Apple logo appears.
Press and hold both the Sleep/Wake button and the Home button for about ten seconds, until the Apple logo appears. The screen should eventually go dark and the iPod Touch should restart and allow you to use it as normal. The music and other media on the device should be preserved after these steps as long as there wasn’t a malfunction that caused data loss.
If the steps above don’t work, it appears you will have to try to restore the iPod Touch. Restoring will remove all data and settings from the device.