Do you depend on your iPod for survival, like you may flatline if the battery goes out? Here’s a little something to keep in mind. Two factors can affect how quickly the battery dies, according to Chris Pirillo: the brightness of the screen and volume. The higher the brightness and volume are, the more battery life you consume.
This may seem like a captain obvious tip, but sometimes you just don't think of these things!
Photo CC 2.0, sabellachan