The iPod Touch and iPhone are just like handheld computers. They have storage space, memory and mobile processors. Just like a computer, therefore, you should shut it down every once in a while. When you are on a roaming or foriegn network the iPhone will then not fetch updated emails. The iPod Touch will deliver improved performance as a result of regular shutting down.

Many iPod Touch owners have observed that playing large play lists or in shuffle mode, the iPod stops playing music and returns to the home screen. When the iPod Touch is turned off by default, it goes into standby mode. The RAM is then maintained just like in a laptop.

When you shut the iPod down, the memory/cache of songs is cleared. TO do this hold the power button on top down until “slide to power off” is displayed. When you startup again, it will then take longer to startup.

Exiting apps does not really close them in the iPod Touch/iPhone. This is because it runs a mobile version of OSX which behaves this way.