Are you using Fritzing for your project documentation?  If not,

Electronics
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Are you using Fritzing for your project documentation? If not, you should be! AdaFruit has been kind enough to include a Fritzing component library that includes the BBB, so give it a try. I stumbled across it on the elinux wiki, and I wish I had found it much sooner: http://elinux.org/Beagleboard:Fritzing_on_the_BeagleBone_Black

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Do remember that the inputs have pull-up and pull-down resistors built-in.

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Because I am not actually modifying the device tree to set the pull-up/pull-down/floating state of the pins (they are mux’d to mode 7 by default, and I’m just using them as-is and setting the GPIOs to “input” via the file system), I figured it was better to be safe than sorry and include the resistor and pull the pins to ground.