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Prevent your iPhone from 'learning' your frequent locations
Your iOS 7-powered iPhone from the get-go records where you go so it can pick out nuggets of information that may help you, particularly if you visit those places regularly. It updates the Today section in your notification center, and can give you estimated times of arrival to your destinations. While it's a handy feature, it is far from absolutely necessary, and can be turned off to save some valuable battery.
Buried deep down in the device's settings, you have to navigate to Settings > Privacy > Location Services > System Services, then switch off the Frequent Locations option. You can also delete any data already collected by tapping Clear History at the bottom of the screen.