Apple's voice-activated assistant is now a well-known personality in his/her own right, but unless you've taken the time to dig into all the features that Siri offers you might not realize just now capable it is (particularly since the arrival of iOS 7). Here are seven ways to get Siri working harder for you. Siri can not only "turn off Bluetooth" but will also help you find a setting if you don't know where it's located. Try asking to "change the font size" or "adjust the screen brightness" or "edit Safari settings," and Siri will direct you to the right options page, with no need for you to search through screens yourself. Call up the app if you want to reconfigure your iOS gadget but aren't sure where the option is (or don't want to go through multiple taps to find it).