Reset Your iPod
Not a hard tip but one that can be useful when your iPod freezes, frequently due to hard drive vibrations. For a 3G iPod (which has a row of buttons across the top), you simultaneously press the Menu+Play/Pause buttons. For a 4G iPod (any device with the click-wheel), you would hold the center button+Menu simultaneously.
This may clear some personal settings such as On-The-Go Playlists that have not been synced to iTunes.
This may clear some personal settings such as On-The-Go Playlists that have not been synced to iTunes.