When I used a Windows-based laptop, I had a handy docking station that let me pop the system out when I was traveling and then pop it back in when when I returned. These days, with a MacBook Pro, I have to unplug and replug five cables.
Henge Docks offers attractive vertical docking stations that let you dock and undock a variety of MacBooks. The initial setup may be a little bothersome -- you have to thread your cables through the appropriate openings -- but once it's done, you can slip your laptop into the dock, click it into place, and be ready for work in seconds.
Price: $119 (for Pro with Retina Display); $55 (for Air); $70 (for 15-in. Pro); $65 (for 13-in. Macbook)