The good news is that most of our portable gadgets now use USB connectors for both data connections and charging, which means we don't need to worry about keeping track of device-specific cables and connectors.
But that still leaves us with three connectors to carry around -- microUSB, typically used for small devices including USB headsets and Android phones, miniUSB, typically used for slightly larger devices such as digital cameras and external batteries, and, of course, the Apple dock connector for iPods, iPads, and iPhones.
Or you can use just one cable, the Qmadix 3-in-1 USB Retractable Charging/Sync Cable.
This is a USB cable at one end, with three interlocking connectors at the other: miniUSB, microUSB, and Apple.
The pieces all nest together to bring power out to the Apple connector, or they can unplug and swivel to the side to access the micro or mini USB connectors.
As a bonus, the cable also is retractable for storage, or extend it to the full 2 1/3 feet as needed to charge or sync your device.
So if you find yourself with managing or carrying too many cables, the Qmadix 3-in-1 Cable is a nice answer to simplify the problem. It's available for around $24.
See my Portable Accessories 2012 article for more on portable storage, audio, power, cases, imaging, and other accessories.
Find the Qmadix 3-in-1 USB Retractable Cable on Amazon.com