So this all started with a floor lamp we bought from IKEA, with a handy foot switch built into the cord. The convenience of just stepping on a foot switch to turn on a lamp is really quite nice, and I've found more opportunities to do this elsewhere in the house.
During one of my many trips to Home Depot, I stumbled on the exact same foot switch I had seen on the IKEA lamp, in the lighting section, hidden in with the lamp parts. For just under $6.00 I had the foot switch, and for another $1.00 I had an extension cord to wire it into. Simply cut one strand of the two-wire extension cord and strip the ends back about half an inch. After twisting the ends, the exposed wire inserts into the switch. Once this is complete, press the wires into place and re-assemble the switch.
This worked particularly well for my office. I have a couple lamps on my desk, and turning them both on would be a bit difficult the way the switches hang off the back of the desk. So, I plugged both lamps into the end of the modified extension cord, and I can turn them both on and off by stepping on the foot switch under my desk.
So... not the most difficult house project, but a very nice convenience.