Working on a 13- or 14-inch notebook screen might be fine when you're out and about, but as soon as you settle down at your desk, you want a pair of 24-inch HD screens with plenty of pixels. Out of the box, most laptops can only output to just one monitor in addition to their default displays. Fortunately, a video dock with DisplayLink technology lets you connect two additional monitors over a single USB port. Lenovo's $179 ThinkPad USB 3.0 dock adds Ethernet, 3.5mm audio and five USB 3.0 ports to dual-display output.

Read Our Lenovo ThinkPad USB 3.0 Dock Review