Don't you hate it when an app asks for permission to use photos or location data and you hit the wrong button? In iOS 6, you can bypass this headache and change permissions on an app-by-app basis.
Go to Settings > Privacy > Service Type, e.g. Location Services or Contacts, and enable or disable permission on an app-by-app basis. You'll find a list of applications that have requested access to each privileged data type. These privacy settings include:
Location Services
Contacts
Calendars
Reminders
Photos
Bluetooth Sharing
Twitter, and
Facebook
Toggle each setting from On to Off or Off to On
