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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!