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Joby GorillaPod (camera tripod)
For those who opt to keep their smartphones with them instead of a digital point-and-shoot camera, you'll more often than not need -- particularly for those fabulous "selfie" shots -- a good, reliable, and flexible stand. The GorillaPod stand can angle your phone at any angle. With its flexible tripod legs, they can wrap around objects. It's quick to set up, and easy to use, and can really help capture that moment without the need to keep your hands glued to your mobile device.
Apple Airport Express (Wi-Fi networking)
Whether you're in a hotel room and limited by one-device-only connectivity, or you're at a workplace and need to connect multiple devices to one place, the Apple Airport Express is ideal. It taps into existing Wi-Fi networks as a single device -- so for hotels, you pay once and once only -- and multiple other devices can tap into your own private network. It saves on costs and keeps your devices in sync when you need it the most.
Last thing: Passport
And one last but very important thing: don't forget your passport. You probably won't get very far without it, particularly if you're flying internationally!