Enable Debugging Settings on Android 4.2 and later

In Android 4.2 and later, the debugging settings options are hidden.  To unlock them, follow these steps:

1. Go to the settings screen.  
2. Under the 'more' tab, select 'About Device'
3. Find 'Build number' and tap it 7 times (after a few times text will pop up telling you how many to go)
4. Go back to the settings menu, and 'Developer Options' will be right above 'About Device'