There are plenty of times when I need additional real estate for my laptop: when I'm on a call using OCS and want to have the controls front and center; Amazon Cloud Player etc. Rather than hauling a monitor with me Ive been using the
Air Display app
for the Kindle Fire. It’s $9.99 and works over Wi-Fi ( both devices must be on the same network). You also need to download and app for your Mac or PC from the Air Display website
here.
If you don't have a Fire you can use any Android device, iOS device, Windows computer, or Mac as your
second monitor.