Whether you own a notebook or netbook, sometimes the peripherals you use every day may outnumber the available ports, forcing you to deal with a rat's nest of cables on your desk and stunting your machine's overall portability. Maybe it's time you purchased a notebook dock. These accessories can double your system's available USB connections, and many even come with DVI or VGA ports for connecting to an external display. There are even affordable wireless docks, which make linking your laptop to various peripherals as simple as plugging in a USB dongle. Here we've rounded up four affordable docks that are great at ramping up your notebook's functionality. Is one of them right for you?