Looking Outwards: Components
The Adafruit CC3000 WiFi Breakout lets your Arduino connect to the internet through a wifi network. This seemed like an obvious choice for the sorts of projects I want to make where internet connectivity is a must. Hopefully this module can connect to the CMU wifi network so that my Arduino can be connected to the internet anywhere on campus!
The Adafruit Ultimate GPS also seemed like a must-have. Being able to react to some input and mark an arbitrary location on a map is very powerful.
It would probably be a good idea to get this sheild with a built in GPS module (micro SD storage) and then connect the wifi module to it.