Instead of letting an old iOS device sit in a drawer and collect dust, give it a second life by repurposing it.
Turn it into cash
As Jessica Dolcourt recently explained, turning an old device into cash is a fairly simple process. Not only does it eliminate clutter around your home office, but it gives you extra funds to invest in that new device you've been drooling over.
One of my favorite uses for an old iPod Touch is using it as a remote for an Apple TV. Anyone who owns an Apple TV can attest to how easily the Apple remote is lost. An iPod Touch is a bit harder to lose, and gives you a keyboard for those long search queries. The Remote app is free on iTunes.
Having an extra monitor is something we can all take advantage of. After upgrading your iPad, don't sell off your old one. Instead, use it as a second monitor to house your e-mail, Facebook, or Twitter feeds.
There are solutions for both Windows and OS X users alike. Both of which are relatively inexpensive and easy to setup.
One of the more simplistic features we now take for granted on all iOS devices is their music-playing capability. Instead of worrying about battery drain on your smartphone, download your favorite music app or load up your music library on an older iOS device and turn it into what amounts to nothing more than an iPod.