Turn Your iPad Into a Second Screen Without Wi-Fi Headaches

My desk looks like it belongs to a Red Bull-swilling stock trader, with at least three screens working at once. One screen is for email, one is for my calendar, and the main screen is for everything else. I'd take this setup with me everywhere if it were possible. Thanks to the the new Duet Display iOS app ($15), combined with a Lightning cable, and my iPad Air 2, I now have a workable second screen from my MacBook Air. Duet Display turns your iPad or iPhone into a second screen for your Mac