If you are on the computer all day like me then an extra monitor or 2 can really make your life easier. If you are reading an email that asks if you are available, you can have your calendar open on the other screen. Or perhaps you want to click on a link in an email, but keep the email open, just open the link on your extra screen. Once you use it for a while you will wonder how you ever got by with just one monitor.
How could an extra monitor make your computer time more productive?