How do I close my apps at the end of the day?

Close inactive apps

1. Double tap the home button to bring up the multi-tasking view

2. Swipe the app's windows upwards to close

3. The app will fly off the screen

How to Close Apps

Double Tap the Home Button... Then swipe the App (not the icon) Upwards... Tap the Home Button when finished.

From Here > http://support.apple.com/kb/HT4211