Tablets give us new possibilities when it comes to mobile computing. Unfortunately, they also give us new things to pack when it comes to carry-on luggage.

The problem is simple: While a tablet is a great addition to any gadget-lover's arsenal, it isn't typically a replacement for an existing device. Most of us still need physical keyboards for long-form typing -- and with business travel in particular, that means you're lugging around both a tablet and a laptop.

By adding a wireless keyboard to your tablet, though, you can transform it from a content-consuming slate into a far more versatile productivity machine. With the aid of a Bluetooth keyboard, I've been able to use my Motorola Xoom for all of my computing needs -- both work and personal -- while away from the office. The keyboard allows me to type desktop-style as needed; the rest of the time, I can use the tablet as a lightweight touch device.

When it comes to keyboards, Android tablets do have a disadvantage: Because the tablets come in a variety of sizes and formats, keyboard manufacturers tend not to create the convenient combination keyboards/cases that are available for the iPad. However, there are still some really excellent options out there.