Hello, I have just bought my first iPod Touch 4g White. However, I am just wondering what is the correct way to close apps. Normally, I open a app and then when I have finished I click the home key. Just a few questions about this: 1) Is the app still running in the background if you click the home key? 2) Double clicking on the home key. Does this show you the most previous app that was used? Or does it show all the apps running in the background? 3) After double clicking, and press and holding an app. I click the minus sign to close the app. Is this the same as question 1. It closes the app? 4) Does all these apps running in the background take up battery power. Many thanks for answering the above questions. But this is my first time with an iPod.