Logitech Harmony remotes have always been among the best for wrangling massive home theater systems, but this particular version actually turns your smartphone into the remote. You'll also get a basic universal remote with physical buttons for when your phone isn't handy. [Logitech Harmony Smart Control, $91]
If you own a MacBook Air, Microsoft Surface, or any Ultrabook that's too thin to fit an ethernet jack, this USB adapter has gigabit speeds, and is a great gadget to keep in your bag for those rare moments where you can't get good Wi-Fi. [Loftek USB 3.0 Gigabit Ethernet LAN Adapter, $16 with code A39A93XB]
Another option is to take any ethernet connection, and turn it into Wi-Fi with a travel router. This one is only $20 today. [TRENDnet Wireless N 150 Mbps Travel Router, $20]
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This isn't quite as cool now that there's an 8TB hard drive coming out, but 5TB for $160 is still a great deal. [Seagate Expansion 5 TB USB 3.0 Desktop External Hard Drive, $160]