Head First Android --- Enable USB debugging on your device

1. Enable USB debugging on your device
    On your device, open “Developer options” (in Android 4.0 onward, this is hidden by default). To enable “Developer
    options,” go to Settings → About Phone and tap the build number seven times. When you return to the previous
    screen, you should now be able to see “Developer options.”    Within “Developer options,” turn on USB debugging.
2. Set up your system to detect your device
    If you’re using a Mac, you can skip this step.
    If you’re using Windows, you need to install a USB driver. You can
    find the latest instructions here:
      http://developer.android.com/tools/extras/oem-usb.html
   If you’re using Ubuntu Linux, you need to create a udev rules file.
  You can find the latest instructions on how to do this here:
     http://developer.android.com/tools/device.html#setting-up